Diamante intake manifold install and general questions thread - Page 3 - Club3G Forum : Mitsubishi Eclipse 3G Forums

MarkSpyder · 03/01/2007, 11:57 AM

Quote:

Originally Posted by GTplaya31

the one the diamante manifold dosen;t have on top on the manifold?

Ah, the hose that goes to the nipple on the GT mani where the Dia mani has no nipple.... That is plugged into the intake "pipe". Use a plastic 5/16" (i think) "Y" so you can link that hose to the intake. Thats what I did. I will be removing that and installing the niple if Dr9023G can fine the proper one. Was planning to drill and tap mine anyways.

GTplaya31 · 03/01/2007, 11:58 AM

there shipped but im going to call him today and find out when they will be here.

013G2T · 03/02/2007, 08:57 AM

Quote:

Originally Posted by strestout1

BTW, Patrick, it you would've mounted the MPS backwards like I did, you'd have no cables or hoses on the manifold itself (and yes, mounting it backwards clears the firewall).

i plan on doing this..but i have not yet cut and solder longer wire!

Quote:

Originally Posted by 'NC[Spyder

GTplaya - looks like we will have some maniold work to do along with the headers this w/e! BTW, I'll call Jeremy today. Any word on your headers shipping?

CMF Gen2.. im guessing? I have not heard any new update..as usual.

013G2T · 03/02/2007, 09:03 AM

BTW: I have had a little idle problem.. when ever the rpms drop it seems to go down to around 200-500rpm range befrore returning to normal idling conditions.. but it seems to be getting better.. today on the way to work it didnt do it at all!

MarkSpyder · 03/02/2007, 09:08 AM

Quote:

Originally Posted by 013G2T

CMF Gen2.. im guessing? I have not heard any new update..as usual.

Ripp 06s or 05s I think.

MarkSpyder · 03/02/2007, 09:10 AM

Quote:

Originally Posted by 013G2T

BTW: I have had a little idle problem.. when ever the rpms drop it seems to go down to around 200-500rpm range befrore returning to normal idling conditions.. but it seems to be getting better.. today on the way to work it didnt do it at all!

Mine is the same. Seems to come and go... I moved my TB cable last night and mounted it directly to the manifold after reoving the stock manifold bracket. Seems to have helped but it did not completely remove the surge. I'll rip the mani off this w/e and recheck all my vac lines, etc.

01SpyderGT · 03/02/2007, 10:04 AM

Quote:

Originally Posted by 013G2T

BTW: I have had a little idle problem.. when ever the rpms drop it seems to go down to around 200-500rpm range befrore returning to normal idling conditions.. but it seems to be getting better.. today on the way to work it didnt do it at all!

Quote:

Originally Posted by NC[Spyder]GT

Mine is the same. Seems to come and go... I moved my TB cable last night and mounted it directly to the manifold after reoving the stock manifold bracket. Seems to have helped but it did not completely remove the surge. I'll rip the mani off this w/e and recheck all my vac lines, etc.

It took a few days for mine to settle in perfectly. [Sorry i havent read over everything] if you havent adjusted your idle air screw out, that will help some as well.

013G2T · 03/02/2007, 10:48 AM

Quote:

Originally Posted by 01SpyderGT

It took a few days for mine to settle in perfectly. [Sorry i havent read over everything] if you havent adjusted your idle air screw out, that will help some as well.

where is located exactly.. i know the general area..

strestout1 · 03/02/2007, 11:34 AM

i wouldnt touch that idle air screw.

013G2T · 03/02/2007, 12:13 PM

Quote:

Originally Posted by strestout1

i wouldnt touch that idle air screw.

well, i was thinking about marking the position of where the screw is now..and screwing it out just a LITTLE bit.. but ya, i know its really senstive and should have a scan tool.

MarkSpyder · 03/02/2007, 12:16 PM

look at the TB. the screw is at the front on the left. you can not miss it. i've been told to use a flathead and not a philips screwdriver...

01SpyderGT · 03/02/2007, 12:51 PM

Quote:

Originally Posted by 013G2T

well, i was thinking about marking the position of where the screw is now..and screwing it out just a LITTLE bit.. but ya, i know its really senstive and should have a scan tool.

Its not that sensitive.. just turn it out half a turn at a time or 1/4 at a time and remember (or write down) how far out you turned it in case you need it later. It really smoothed out my idle [but then again I added 310 injectors as well]. And other than my MDP snafu I have no issues

PharmEcis · 03/23/2007, 12:23 PM

Ok I have some input for this thread and some questions too.

I have client's car that I built a motor for and installed a Ripp SDS stage 2 setup in. The car has been converted with my own fuel and electronic setup. The car is also running RPW's long tube headers. The car is using the stock throttlebody with a Diamante manifold.

I've been having a hell of a time with the P401 code. This is for EGR insufficient flow. EGR was properly hooked up as is all the vacuum lines. I've tested the EGR valve and it works flawlessly. The solenoid also works fine. I've tested the vacuum check valve for EGR and it also works good. I've swapped solenoids, check valve and EGR valve just to eliminate those as a possibility. I went through the complete diagnostics for the EGR system and I found the following:

From the EGR port I get great vacuum just like I'm supposed to. That would be the first nipple on the throttlebody, closest to the front of the engine. The rear nipple on the throttle body should read zero vacuum at idle but it does not. It reads a good 4 in/hg of vacuum. The reason I know it should read zero is because I went and tested with my vacuum pump / gauge on another stock 3G. What I've been able to determine is that the throttlebody opening on the Diamante manifold is just too large for the 60mm throttlebody. The throttlebody opening on the Diamante manifold measures 68mm. Because it is so large, the throttlebody is not sealing properly against the manifold. One of those ports is supposed to read manifold vacuum and the other prethrottlebody vacuum.

Bottom line, this is causing the EGR system to not behave properly. Instead of there being no vacuum on the EGR valve line and then vacuum to open it, the valve is constantly getting 4 to 5 in/hg of vacuum and when the solenoid is switching on to activate the EGR valve, it actually gets NO vacuum!

Is anyone else experiencing this code? I managed to get this in both naturally aspirated mode (blower disconnected from the intake piping) and w/ the blower hooked up. And yes, I did put a new gasket in place to no avail.

03/23/2007, 02:03 PM

Quote:

Originally Posted by PharmEcis

Ok I have some input for this thread and some questions too.

I have client's car that I built a motor for and installed a Ripp SDS stage 2 setup in. The car has been converted with my own fuel and electronic setup. The car is also running RPW's long tube headers. The car is using the stock throttlebody with a Diamante manifold.

I've been having a hell of a time with the P401 code. This is for EGR insufficient flow. EGR was properly hooked up as is all the vacuum lines. I've tested the EGR valve and it works flawlessly. The solenoid also works fine. I've tested the vacuum check valve for EGR and it also works good. I've swapped solenoids, check valve and EGR valve just to eliminate those as a possibility. I went through the complete diagnostics for the EGR system and I found the following:

From the EGR port I get great vacuum just like I'm supposed to. That would be the first nipple on the throttlebody, closest to the front of the engine. The rear nipple on the throttle body should read zero vacuum at idle but it does not. It reads a good 4 in/hg of vacuum. The reason I know it should read zero is because I went and tested with my vacuum pump / gauge on another stock 3G. What I've been able to determine is that the throttlebody opening on the Diamante manifold is just too large for the 60mm throttlebody. The throttlebody opening on the Diamante manifold measures 68mm. Because it is so large, the throttlebody is not sealing properly against the manifold. One of those ports is supposed to read manifold vacuum and the other prethrottlebody vacuum.

Bottom line, this is causing the EGR system to not behave properly. Instead of there being no vacuum on the EGR valve line and then vacuum to open it, the valve is constantly getting 4 to 5 in/hg of vacuum and when the solenoid is switching on to activate the EGR valve, it actually gets NO vacuum!

Is anyone else experiencing this code? I managed to get this in both naturally aspirated mode (blower disconnected from the intake piping) and w/ the blower hooked up. And yes, I did put a new gasket in place to no avail.

Did you use a diamante gasket or an eclipse gasket? You are the first one I have seen post this code up. I have a manifold sitting here and a V6 throttle body. I will look at the differences tonight on the diamante and GT intake manifold and see if I can find any differences in the flange set-up besides the obvious diameter difference. It is always better for two heads looking at something then one. I will let you know what i find out. On another note. Did you swap out the MDP sensor? I know it is a long shot but I belive this sensor is the one that pics up the differences in pressure when the EGR is active.

Dave

MarkSpyder · 03/23/2007, 02:09 PM

I've gotten a P0455 a couple times fter this swap but no P0401. Very interested in what you all find out as I am still experiencing intermident idle surge. I wonder if that may be related...

01SpyderGT · 03/23/2007, 02:59 PM

Quote:

Originally Posted by PharmEcis

I've been having a hell of a time with the P401 code. This is for EGR insufficient flow.

Is anyone else experiencing this code? I managed to get this in both naturally aspirated mode (blower disconnected from the intake piping) and w/ the blower hooked up. And yes, I did put a new gasket in place to no avail.

I have been having the same problem since I did the swap. I had my EGR tube disconnected for quite a while before I did the swap and had no issues with codes.

I was trying to consider what is different? The valve is turned 90 degrees, do the holes line up? Is there a restriction there? Are the passages from the tube to the valve location the same?

Ive cleared my code a few times but it keeps coming back. I havent taken the time to try to sit down and fix it. If you are stumped then I feel I'm SOL.

01SpyderGT · 03/23/2007, 03:02 PM

Quote:

Originally Posted by Dr. 9023G

You are the first one I have seen post this code up.

Quote:

Originally Posted by 01SpyderGT

P0401 code tonight... will keep an eye to see if it comes back....

03/23/2007, 04:10 PM

Do you guys have the egr clocked at the right position?

01SpyderGT · 03/23/2007, 04:35 PM

Quote:

Originally Posted by Dr. 9023G

Do you guys have the egr clocked at the right position?

explain?

PharmEcis · 03/23/2007, 05:29 PM

I think Dave is referring to having the EGR pipe bolted up properly and not leaking.

Pictures speak louder than words so I'll show you guys the problem of the Diamante manifold w/ the stock throttlebody.

Here you see the stock Diamante gasket on the Diamante manifold. Note that the gasket is basically the exact diameter of the throttlebody opening in the manifold.

Here you can see the Diamante gasket laid over the GT throttlebody. Notice the holes in the throttlebody at the top. Those are normally sealed by the stock gasket on the GT. The problem lies in the fact that EGR valve to work uses the port on the left which has a channel to a port below and to the left of it which runs through the throttlebody to the intake piping side of the throttlebody. This is so that there is no vacuum on this port during idle and when the throttleplate gets cracked it will see a tiny amount of vacuum that allows the EGR valve to be operated. Now, it is possible that the stock gasket might sorta seal for a while and allow you to run check engine free for a bit, but I doubt it will last. If you ever replace the gasket, the leak will be there and allow the A port to get vacuum when it shouldn't.

I'm not off in my diagnosis of this. From what I've seen, anyone who swaps to a Diamante manifold and retains the use of the stock throttlebody should eventually pop a 401 code because the valve will not have vacuum to operate. Basically this feeds the EGR solenoid w/ a trace amount of vacuum which the ECU can then engage by turning the solenoid on. This then allows the check valve (the round thing) to supply full vacuum to the EGR valve. That is why the vacuum port closest to the front of the car labeled E is hooked up to the check valve and is always supplying manifold pressure.

Due to this, the GTS seems to be a superior manifold for the stock throttlebody. I even tried hooking a brat up simply to the MDP sensor to try and fool the ECU. No dice.

BTW Dave, yes the MDP is fine as I can read it's fluctuations in EVOScan under boost.

Could this cause idle fluctuations? Absolutely. It is for all intents and purposes an internal vacuum leak. The throttlebody is not sealed and is allowing air to pass from one side of the tb to the other. While it's metered air, it's still not supposed to be entering the engine.

PharmEcis · 03/23/2007, 05:32 PM

Oh I almost forgot, I tried to cheat and install a small vacuum source in front of the throttlebody. While it did allow me to see absolutely no vacuum at idle, I also wouldn't see any vacuum while revving the motor which opens the throttle plate. It is possible I didn't tap close enough to the throttlebody. Basically you need a new port for the E line on the throttlebody. The Diamante manifold makes it useless.

03/23/2007, 05:50 PM

So why not disable it all together like Repfrenzo did?

MarkSpyder · 03/23/2007, 09:16 PM

Quote:

Originally Posted by Dr. 9023G

So why not disable it all together like Repfrenzo did?

eh?

I'm feelin like a guinea pig... got a link? I'm so tired of this fluctuation although it does dissappear for awhile. Its intermident.

strestout1 · 03/23/2007, 09:29 PM

FYI, i was having weird idles when fully warmed up going between 300-800rpm and the culprit was that i hadn't tightened the bolt that holds the CAI to the frame properly. couple washers and a little muscle and the idle problem is fixed.

MarkSpyder · 03/23/2007, 09:32 PM

Quote:

Originally Posted by strestout1

FYI, i was having weird idles when fully warmed up going between 300-800rpm and the culprit was that i hadn't tightened the bolt that holds the CAI to the frame properly. couple washers and a little muscle and the idle problem is fixed.

You think that is vacuum leak related? I guess if the intake isnt sitting correctly then the rubber elbow doesn't seal properly? I ask because my WAI hits my battery and doesn't look like it is sealed 100%. The idle ONLY happens after the car is warm. The warmer the more frequent the surge I'm finding.

strestout1 · 03/23/2007, 09:33 PM

Quote:

Originally Posted by NC[Spyder]GT

You think that is vacuum leak related? I guess if the intake isnt sitting correctly then the rubber elbow doesn't seal properly? I ask because my WAI hits my battery and doesn't look like it is sealed 100%. The idle ONLY happens after the car is warm. The warmer the more frequent the surge I'm finding.

it's possible. i did the WAI thing for a couple of days and didn't like how much the intake wobbled around so i cut about an inch off the CAI piping (the piece AFTER the MAS) to make it fit again.

03/25/2007, 08:12 AM

Quote:

Originally Posted by PharmEcis

Oh I almost forgot, I tried to cheat and install a small vacuum source in front of the throttlebody. While it did allow me to see absolutely no vacuum at idle, I also wouldn't see any vacuum while revving the motor which opens the throttle plate. It is possible I didn't tap close enough to the throttlebody. Basically you need a new port for the E line on the throttlebody. The Diamante manifold makes it useless.

Greg from what I can tell. Those ports seal against the stock GT manifold flange. I worked on this for about an hour last night an finally just used a grease pencil to see where they make contact. So with the stock GT TB gasket and the flange itself those holes actual are not open to any vac source. So if you use the mistu. white goop on that side of the gasket or fill those holes with it you should correct the problem. If you have any input on this let me know.

Dave

MarkSpyder · 03/25/2007, 10:15 AM

Quote:

Originally Posted by strestout1

it's possible. i did the WAI thing for a couple of days and didn't like how much the intake wobbled around so i cut about an inch off the CAI piping (the piece AFTER the MAS) to make it fit again.

I widened my battery tray bolts to move the battery over an extra inch due to the wider Diamonte manifold but it didn't help with the WAI fitment. Apparently the fitment issue with the WAI is related more to where the tube bolts to the standoff stud on the engine block. I guess I'll try and fab a hanger or bracket of some sort to allow the WAI to fit without kinking the elbow coupler between the WAI and the TB.

Dave, Thanks for looking into those vacuum "holes" and their relation to the gasket. If I still have the idle surge after starting up today i will probably try sealing them with the Mitsu white goop next w/e.

But, does anyone know if the RPW or Diamonte TB will solve any possible issues with these vacuum holes? I'm thinking it may be easier for me to just swap out the GT TB for a superior one and eliminate that gasket/vacuum hole alignment issue at the same time.

03/25/2007, 12:33 PM

I will post a how to seal it tonight. There is one side that you don't want plugged but the needs to see vacume when the butterfly on the TB opens. You will need your stock manifold to do this how to correctly.

Dave

MarkSpyder · 03/26/2007, 07:18 AM

FYI, after tapping the manifold for a 2nd nipple my idle surge is still present. Now I'm lost as to what could be causing this.... Looking forward to seeing the "How To" Dave!

BTW, can the Mitsu white goop be removed fairly easily or would you need to drill it out? Just want to make sure I can back out of plugging the holes if it doesn't help my idle surge issue.

PharmEcis · 03/26/2007, 01:59 PM

Quote:

Originally Posted by Dr. 9023G

Greg from what I can tell. Those ports seal against the stock GT manifold flange. I worked on this for about an hour last night an finally just used a grease pencil to see where they make contact. So with the stock GT TB gasket and the flange itself those holes actual are not open to any vac source. So if you use the mistu. white goop on that side of the gasket or fill those holes with it you should correct the problem. If you have any input on this let me know.

Dave

You would be correct as to where they seal. The gasket for the stock TB is about the same size as the stock throttlebody opening on the stock manifold.

I actually got this car to pass the EGR test but I cheated, I used a BRAT. Sealing the gasket against the throttlebody was an idea I had too but I don't like using any kind of sealer in the intake tract. The sealant might work for an NA guy but I have a feeling that boost would push the gasket off the tb a bit and not allow it to seal properly.

03/26/2007, 02:21 PM

I talked to the guys at Mitsu and they said the white diamond care won't come off if it properly cured. The gasket will have to be pressed against the stock manifold flange for a few days to allow it to properly dry. The said heat would not be a factor because they use this to seal the thermostat housing to the intake mani on the 4 cyl., they also use it on the oil pans, and other hot spots.

...and getting a proflow or Rpw TB will not fix this because they use the stock throttle body as the core. The only thing they do is bore it out and put in the proper size butterfly.

PharmEcis · 03/26/2007, 02:27 PM

A Diamante throttlebody on the other hand is designed properly for this manifold and would work without a problem.

03/26/2007, 02:31 PM

Quote:

Originally Posted by PharmEcis

A Diamante throttlebody on the other hand is designed properly for this manifold and would work without a problem.

That is what I heard. GTPlaya said he had plenty of room in the bay for it. I don't have an eclipse right no to test fit one on but I will get to work on it. Can you confirm that it is a direct fit Greg?

Dave

MarkSpyder · 03/26/2007, 02:31 PM

Strestout1: Which TB are you using? Just seem odd to me that some Diamonte manifold swappers have the idle surge and others do not...

MarkSpyder · 03/26/2007, 02:33 PM

Quote:

Originally Posted by Dr. 9023G

That is what I heard. GTPlaya said he had plenty of room in the bay for it. I don't have an eclipse right no to test fit one on but I will get to work on it. Can you confirm that it is a direct fit Greg?

Dave

Using the Diamonte TB "may" cause you to loose the cruise control, due to fitment issues, correct? Either way, I think I'm gonna try it. With my silencer removed (from here on out) my idle surge can be embarassing at times. It sounds like I'm pumping the gas ( a little) when sitting @ a red light.

03/26/2007, 03:23 PM

Using the Diamonte TB "may" cause you to loose the cruise control

Brian said he didn't have to.

strestout1 · 03/26/2007, 10:06 PM

Quote:

Originally Posted by NC[Spyder]GT

Strestout1: Which TB are you using? Just seem odd to me that some Diamonte manifold swappers have the idle surge and others do not...

stock GT TB for now, but i'm looking for a Diamante TB, though car-parts looks fresh out in my area though i'm gonna see if i can get one shipped. Dave, can you get me one at a decent price?

MarkSpyder · 03/27/2007, 07:44 AM

Quote:

Originally Posted by strestout1

Dave, can you get me one at a decent price?

03/27/2007, 12:39 PM

I have gotten several but they are not cheap at the moment. Most seem to be going for 85-100 bucks with all the sensors on them.

Dave

strestout1 · 03/27/2007, 04:34 PM

thats about what im looking at. can you get your hands on one and send it this way?

03/27/2007, 04:35 PM

I have 3 coming. with the IAC and TPS

013G2T · 03/28/2007, 10:58 PM

its been a while since i read through this thread.. but i too, am have the idle surge problem..

i tried swapping the diamante tb.. but i got different idle issue.. there was no fitment issue.. besides bending the valve nipple to seat underneath the strut bar..the issue i had was different internals for the TPS & IAC. the eclipse IAC tip didnt extend as far as the diamante IAC does causing diffenent linement .. and the eclipse IAC motor had different internals (design).. i will try and take some pics next time i disassemble the tb..

strestout1 · 03/28/2007, 11:07 PM

Quote:

Originally Posted by Dr. 9023G

I have 3 coming. with the IAC and TPS

i got dibs on one then.

@013G2T: how were they different? if you splice the sensor plugs from the Diamante TB to the Eclipse harnesses, it should work just fine AFAIK.

013G2T · 03/28/2007, 11:31 PM

Quote:

Originally Posted by strestout1

i got dibs on one then.

@013G2T: how were they different? if you splice the sensor plugs from the Diamante TB to the Eclipse harnesses, it should work just fine AFAIK.

thats what ill find out..

MarkSpyder · 03/29/2007, 07:01 AM

Quote:

Originally Posted by 013G2T

i tried swapping the diamante tb.. but i got different idle issue.

What is your different idle issue? I'll be swapping to the Diamonte manifold soon and would like to know what I should expect. Thx!

GTplaya31 · 03/29/2007, 09:09 AM

maybe because he didn't have the sensors hooked up.

013G2T · 03/29/2007, 01:05 PM

Quote:

Originally Posted by GTplaya31

maybe because he didn't have the sensors hooked up.

sensors unhooked intentionally

Quote:

Originally Posted by NC[Spyder]GT

What is your different idle issue? I'll be swapping to the Diamonte manifold soon and would like to know what I should expect. Thx!

you need to swap out the IAC & TPS from the Diamante

03/29/2007, 01:27 PM

Quote:

Originally Posted by 013G2T

sensors unhooked intentionally

you need to swap out the IAC & TPS from the Diamante

Yeas that is right. The TB I will be getting in will have those sensors attached.

Dave

GTplaya31 · 03/29/2007, 02:04 PM

hey dave can you get me just the sensors (male connection.)

03/29/2007, 02:40 PM

I am working on it.

Dave

MarkSpyder · 03/29/2007, 02:41 PM

Quote:

Originally Posted by 013G2T

sensors unhooked intentionally

you need to swap out the IAC & TPS from the Diamante

Oh, I thought you had the TB installed. Of course you will have idle issues if those are left unhooked! I'm wondering if anyone who has swapped in the Diamonte TB (completely with sensors) is having idle surge.

03/30/2007, 07:37 AM

Well we will know soon because I have your TB with sensors and Oil pan here Mark.

Dave

MarkSpyder · 03/30/2007, 07:56 AM

Quote:

Originally Posted by Dr. 9023G

Well we will know soon because I have your TB with sensors and Oil pan here Mark.

Dave

Lemme know the total and ship when you can. I'll try the TB out as soon as it arrives and will post my results/findings immediately. I'll be sure to get plenty of photos during the install too.

GTplaya31 · 04/04/2007, 08:21 PM

hey well i still have the idel surge.

but i figured out something when ever my heat is on my idel is fine, but when ever i turn it off, the idel jumps..... could this be something with the coolant??

013G2T · 04/04/2007, 10:18 PM

Quote:

Originally Posted by GTplaya31

hey well i still have the idel surge.

but i figured out something when ever my heat is on my idel is fine, but when ever i turn it off, the idel jumps..... could this be something with the coolant??

ive been running my ac / heater 24/7 since i swapped the manifold.. seems to hold idle better..

013G2T · 04/05/2007, 12:13 AM

Eclipse / Diamante TPS - Internal Difference:

Diamante IAC - The Eclipse IAC (Rubber Sensor Tip) doesnt extend into hole & mounting bolts are in different pattern:

MarkSpyder · 04/05/2007, 07:11 AM

Quote:

Originally Posted by GTplaya31

when ever my heat is on my idel is fine, but when ever i turn it off, the idel jumps..... could this be something with the coolant??

I can't imagine the coolant affecting the idle... I have ZERO heat or coolant issues and I still have the idle surge so I'm guessing its related to something else. Hopefully, if its possible, someone can elaborate on how it affects it. I'm eyeballing those TPS sensor differences though.... I think I recall that since my mani swap I have not seen a TPS of more than 17-20% on my datalogger... I'll have to check that again when the car is startable. (main power harness is ripped out now and I'm in the process of installing 0/1ga.)

04/05/2007, 08:04 AM

Hopefully the TB swap corrects this.

Dave

mjmike · 04/05/2007, 08:06 AM

Its funny to me why all you guys go through all this BS trying to get this manifold to work I used a GTS intake and it was basically bolt on and extend a few factory sensors. I bored the factory TB with no fitment or sensor issues. I have not stared my car yet but I can say that the GTS plenum is the best option for our cars. The manifold is basically the same size as this one as well as being able to use most of the factory GT brackets. OK so I get you will be able to get a little more air though this TB is it worth the headache? You can make those numbers up when you go FI. Just a thought.

Hytech Headers
Bored TB
GTS Intake upgrade w/Varitable runners
ECU Flash Dyno results soon.

03/01/2007, 11:58 AM	#122 (permalink)
GTplaya31 Senior Member Join Date: May 2004 Location: Fort Bragg, NC Vehicle: 2000 GT fed spec Posts: 1,728	there shipped but im going to call him today and find out when they will be here. __________________

03/02/2007, 12:16 PM	#131 (permalink)
MarkSpyder BoomGoesTheDynaMitt Join Date: May 2004 Location: Cary, North Carolina Vehicle: 2001 Spyder GT (silver) Posts: 7,180	look at the TB. the screw is at the front on the left. you can not miss it. i've been told to use a flathead and not a philips screwdriver... __________________ FI Build: http://www.club3g.com/forum/gt-gts/1...ll-thread.html In Progress: WAIC, Meth Inj, SDS tensioner, ECUFlash Completed Perf Mods: Vortech V-5, 6G74 Mani/TB, Ripp Headers, Invidia CB w/ HP II Res, Fidanza F/W, Spec S3, Quaife LSD, ZT2/WB/EGT/Boost, Flashable ECU, A1000-6 FPR, VR4 Rails, Venom 310cc Injectors, Walbro GSS342 Future: Pistons, SDS Pullies

03/23/2007, 02:09 PM	#135 (permalink)
MarkSpyder BoomGoesTheDynaMitt Join Date: May 2004 Location: Cary, North Carolina Vehicle: 2001 Spyder GT (silver) Posts: 7,180	I've gotten a P0455 a couple times fter this swap but no P0401. Very interested in what you all find out as I am still experiencing intermident idle surge. I wonder if that may be related... __________________ FI Build: http://www.club3g.com/forum/gt-gts/1...ll-thread.html In Progress: WAIC, Meth Inj, SDS tensioner, ECUFlash Completed Perf Mods: Vortech V-5, 6G74 Mani/TB, Ripp Headers, Invidia CB w/ HP II Res, Fidanza F/W, Spec S3, Quaife LSD, ZT2/WB/EGT/Boost, Flashable ECU, A1000-6 FPR, VR4 Rails, Venom 310cc Injectors, Walbro GSS342 Future: Pistons, SDS Pullies

03/23/2007, 05:29 PM	#140 (permalink)
PharmEcis Banned Join Date: Sep 2004 Location: Silver Spring, MD Vehicle: 2g stratus 2g eclipse Posts: 5,937	I think Dave is referring to having the EGR pipe bolted up properly and not leaking. Pictures speak louder than words so I'll show you guys the problem of the Diamante manifold w/ the stock throttlebody. Here you see the stock Diamante gasket on the Diamante manifold. Note that the gasket is basically the exact diameter of the throttlebody opening in the manifold. Here you can see the Diamante gasket laid over the GT throttlebody. Notice the holes in the throttlebody at the top. Those are normally sealed by the stock gasket on the GT. The problem lies in the fact that EGR valve to work uses the port on the left which has a channel to a port below and to the left of it which runs through the throttlebody to the intake piping side of the throttlebody. This is so that there is no vacuum on this port during idle and when the throttleplate gets cracked it will see a tiny amount of vacuum that allows the EGR valve to be operated. Now, it is possible that the stock gasket might sorta seal for a while and allow you to run check engine free for a bit, but I doubt it will last. If you ever replace the gasket, the leak will be there and allow the A port to get vacuum when it shouldn't. I'm not off in my diagnosis of this. From what I've seen, anyone who swaps to a Diamante manifold and retains the use of the stock throttlebody should eventually pop a 401 code because the valve will not have vacuum to operate. Basically this feeds the EGR solenoid w/ a trace amount of vacuum which the ECU can then engage by turning the solenoid on. This then allows the check valve (the round thing) to supply full vacuum to the EGR valve. That is why the vacuum port closest to the front of the car labeled E is hooked up to the check valve and is always supplying manifold pressure. Due to this, the GTS seems to be a superior manifold for the stock throttlebody. I even tried hooking a brat up simply to the MDP sensor to try and fool the ECU. No dice. BTW Dave, yes the MDP is fine as I can read it's fluctuations in EVOScan under boost. Could this cause idle fluctuations? Absolutely. It is for all intents and purposes an internal vacuum leak. The throttlebody is not sealed and is allowing air to pass from one side of the tb to the other. While it's metered air, it's still not supposed to be entering the engine. Last edited by PharmEcis; 03/23/2007 at 05:51 PM.

03/26/2007, 07:18 AM	#150 (permalink)
MarkSpyder BoomGoesTheDynaMitt Join Date: May 2004 Location: Cary, North Carolina Vehicle: 2001 Spyder GT (silver) Posts: 7,180	FYI, after tapping the manifold for a 2nd nipple my idle surge is still present. Now I'm lost as to what could be causing this.... Looking forward to seeing the "How To" Dave! BTW, can the Mitsu white goop be removed fairly easily or would you need to drill it out? Just want to make sure I can back out of plugging the holes if it doesn't help my idle surge issue. __________________ FI Build: http://www.club3g.com/forum/gt-gts/1...ll-thread.html In Progress: WAIC, Meth Inj, SDS tensioner, ECUFlash Completed Perf Mods: Vortech V-5, 6G74 Mani/TB, Ripp Headers, Invidia CB w/ HP II Res, Fidanza F/W, Spec S3, Quaife LSD, ZT2/WB/EGT/Boost, Flashable ECU, A1000-6 FPR, VR4 Rails, Venom 310cc Injectors, Walbro GSS342 Future: Pistons, SDS Pullies

03/02/2007, 09:03 AM	#124 (permalink)
013G2T Senior Member Join Date: Sep 2005 Location: Austin, TX Vehicle: Eclipse GT Posts: 123	BTW: I have had a little idle problem.. when ever the rpms drop it seems to go down to around 200-500rpm range befrore returning to normal idling conditions.. but it seems to be getting better.. today on the way to work it didnt do it at all!

03/02/2007, 11:34 AM	#129 (permalink)
strestout1 Senior Member Join Date: May 2006 Location: Columbia, SC Vehicle: 00 Eclipse GT Fed Spec Posts: 742	i wouldnt touch that idle air screw.

03/23/2007, 12:23 PM	#133 (permalink)
PharmEcis Banned Join Date: Sep 2004 Location: Silver Spring, MD Vehicle: 2g stratus 2g eclipse Posts: 5,937	Ok I have some input for this thread and some questions too. I have client's car that I built a motor for and installed a Ripp SDS stage 2 setup in. The car has been converted with my own fuel and electronic setup. The car is also running RPW's long tube headers. The car is using the stock throttlebody with a Diamante manifold. I've been having a hell of a time with the P401 code. This is for EGR insufficient flow. EGR was properly hooked up as is all the vacuum lines. I've tested the EGR valve and it works flawlessly. The solenoid also works fine. I've tested the vacuum check valve for EGR and it also works good. I've swapped solenoids, check valve and EGR valve just to eliminate those as a possibility. I went through the complete diagnostics for the EGR system and I found the following: From the EGR port I get great vacuum just like I'm supposed to. That would be the first nipple on the throttlebody, closest to the front of the engine. The rear nipple on the throttle body should read zero vacuum at idle but it does not. It reads a good 4 in/hg of vacuum. The reason I know it should read zero is because I went and tested with my vacuum pump / gauge on another stock 3G. What I've been able to determine is that the throttlebody opening on the Diamante manifold is just too large for the 60mm throttlebody. The throttlebody opening on the Diamante manifold measures 68mm. Because it is so large, the throttlebody is not sealing properly against the manifold. One of those ports is supposed to read manifold vacuum and the other prethrottlebody vacuum. Bottom line, this is causing the EGR system to not behave properly. Instead of there being no vacuum on the EGR valve line and then vacuum to open it, the valve is constantly getting 4 to 5 in/hg of vacuum and when the solenoid is switching on to activate the EGR valve, it actually gets NO vacuum! Is anyone else experiencing this code? I managed to get this in both naturally aspirated mode (blower disconnected from the intake piping) and w/ the blower hooked up. And yes, I did put a new gasket in place to no avail.

03/23/2007, 04:10 PM	#138 (permalink)
Dr. 9023G Guest Posts: n/a	Do you guys have the egr clocked at the right position?

03/23/2007, 05:32 PM	#141 (permalink)
PharmEcis Banned Join Date: Sep 2004 Location: Silver Spring, MD Vehicle: 2g stratus 2g eclipse Posts: 5,937	Oh I almost forgot, I tried to cheat and install a small vacuum source in front of the throttlebody. While it did allow me to see absolutely no vacuum at idle, I also wouldn't see any vacuum while revving the motor which opens the throttle plate. It is possible I didn't tap close enough to the throttlebody. Basically you need a new port for the E line on the throttlebody. The Diamante manifold makes it useless.

03/23/2007, 05:50 PM	#142 (permalink)
Dr. 9023G Guest Posts: n/a	So why not disable it all together like Repfrenzo did?

03/23/2007, 09:29 PM	#144 (permalink)
strestout1 Senior Member Join Date: May 2006 Location: Columbia, SC Vehicle: 00 Eclipse GT Fed Spec Posts: 742	FYI, i was having weird idles when fully warmed up going between 300-800rpm and the culprit was that i hadn't tightened the bolt that holds the CAI to the frame properly. couple washers and a little muscle and the idle problem is fixed.

03/25/2007, 12:33 PM	#149 (permalink)
Dr. 9023G Guest Posts: n/a	I will post a how to seal it tonight. There is one side that you don't want plugged but the needs to see vacume when the butterfly on the TB opens. You will need your stock manifold to do this how to correctly. Dave

03/26/2007, 02:21 PM	#152 (permalink)
Dr. 9023G Guest Posts: n/a	I talked to the guys at Mitsu and they said the white diamond care won't come off if it properly cured. The gasket will have to be pressed against the stock manifold flange for a few days to allow it to properly dry. The said heat would not be a factor because they use this to seal the thermostat housing to the intake mani on the 4 cyl., they also use it on the oil pans, and other hot spots. ...and getting a proflow or Rpw TB will not fix this because they use the stock throttle body as the core. The only thing they do is bore it out and put in the proper size butterfly.

03/26/2007, 02:27 PM	#153 (permalink)
PharmEcis Banned Join Date: Sep 2004 Location: Silver Spring, MD Vehicle: 2g stratus 2g eclipse Posts: 5,937	A Diamante throttlebody on the other hand is designed properly for this manifold and would work without a problem.

03/26/2007, 02:31 PM	#155 (permalink)
MarkSpyder BoomGoesTheDynaMitt Join Date: May 2004 Location: Cary, North Carolina Vehicle: 2001 Spyder GT (silver) Posts: 7,180	Strestout1: Which TB are you using? Just seem odd to me that some Diamonte manifold swappers have the idle surge and others do not... __________________ FI Build: http://www.club3g.com/forum/gt-gts/1...ll-thread.html In Progress: WAIC, Meth Inj, SDS tensioner, ECUFlash Completed Perf Mods: Vortech V-5, 6G74 Mani/TB, Ripp Headers, Invidia CB w/ HP II Res, Fidanza F/W, Spec S3, Quaife LSD, ZT2/WB/EGT/Boost, Flashable ECU, A1000-6 FPR, VR4 Rails, Venom 310cc Injectors, Walbro GSS342 Future: Pistons, SDS Pullies

03/26/2007, 03:23 PM	#157 (permalink)
Dr. 9023G Guest Posts: n/a	Using the Diamonte TB "may" cause you to loose the cruise control Brian said he didn't have to.

03/27/2007, 12:39 PM	#160 (permalink)
Dr. 9023G Guest Posts: n/a	I have gotten several but they are not cheap at the moment. Most seem to be going for 85-100 bucks with all the sensors on them. Dave

03/27/2007, 04:34 PM	#161 (permalink)
strestout1 Senior Member Join Date: May 2006 Location: Columbia, SC Vehicle: 00 Eclipse GT Fed Spec Posts: 742	thats about what im looking at. can you get your hands on one and send it this way?

03/27/2007, 04:35 PM	#162 (permalink)
Dr. 9023G Guest Posts: n/a	I have 3 coming. with the IAC and TPS

03/28/2007, 10:58 PM	#163 (permalink)
013G2T Senior Member Join Date: Sep 2005 Location: Austin, TX Vehicle: Eclipse GT Posts: 123	its been a while since i read through this thread.. but i too, am have the idle surge problem.. i tried swapping the diamante tb.. but i got different idle issue.. there was no fitment issue.. besides bending the valve nipple to seat underneath the strut bar..the issue i had was different internals for the TPS & IAC. the eclipse IAC tip didnt extend as far as the diamante IAC does causing diffenent linement .. and the eclipse IAC motor had different internals (design).. i will try and take some pics next time i disassemble the tb..

03/29/2007, 09:09 AM	#167 (permalink)
GTplaya31 Senior Member Join Date: May 2004 Location: Fort Bragg, NC Vehicle: 2000 GT fed spec Posts: 1,728	maybe because he didn't have the sensors hooked up. __________________

03/29/2007, 02:04 PM	#170 (permalink)
GTplaya31 Senior Member Join Date: May 2004 Location: Fort Bragg, NC Vehicle: 2000 GT fed spec Posts: 1,728	hey dave can you get me just the sensors (male connection.) __________________

03/29/2007, 02:40 PM	#171 (permalink)
Dr. 9023G Guest Posts: n/a	I am working on it. Dave

03/30/2007, 07:37 AM	#173 (permalink)
Dr. 9023G Guest Posts: n/a	Well we will know soon because I have your TB with sensors and Oil pan here Mark. Dave

04/04/2007, 08:21 PM	#175 (permalink)
GTplaya31 Senior Member Join Date: May 2004 Location: Fort Bragg, NC Vehicle: 2000 GT fed spec Posts: 1,728	hey well i still have the idel surge. but i figured out something when ever my heat is on my idel is fine, but when ever i turn it off, the idel jumps..... could this be something with the coolant?? __________________

04/05/2007, 12:13 AM	#177 (permalink)
013G2T Senior Member Join Date: Sep 2005 Location: Austin, TX Vehicle: Eclipse GT Posts: 123	Eclipse / Diamante TPS - Internal Difference: Diamante IAC - The Eclipse IAC (Rubber Sensor Tip) doesnt extend into hole & mounting bolts are in different pattern:

04/05/2007, 08:04 AM	#179 (permalink)
Dr. 9023G Guest Posts: n/a	Hopefully the TB swap corrects this. Dave

04/05/2007, 08:06 AM	#180 (permalink)
mjmike Senior Member Join Date: Jan 2005 Posts: 136	Its funny to me why all you guys go through all this BS trying to get this manifold to work I used a GTS intake and it was basically bolt on and extend a few factory sensors. I bored the factory TB with no fitment or sensor issues. I have not stared my car yet but I can say that the GTS plenum is the best option for our cars. The manifold is basically the same size as this one as well as being able to use most of the factory GT brackets. OK so I get you will be able to get a little more air though this TB is it worth the headache? You can make those numbers up when you go FI. Just a thought. Hytech Headers Bored TB GTS Intake upgrade w/Varitable runners ECU Flash Dyno results soon.

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