Diamante Throttle Body Swap

[ICEMAN99TURBO]

Originally Posted by drunkoffjuic

So... i fixed the TPS sensor, and now im throwing two codes:

P0401 Exhaust Gas Recirculation Flow Insufficient Detected
P0171 System Too Lean (Bank 1)

Any ideas why??

For the P0401, do you have a filter on the back of the intake where that pipe went into the rear bank manifold? Sounds like I threw that one before.

[drunkoffjuic]

Ok, yeah i do have a filter. But i think i may have foud my problem. I had the line that "t's" with the vacuum control valve and the EGR solenoid connected to the manifold instead of the EGR Valve, and the other connection for the EGR solenoid connected to the EGR Valve. Huge mistake in reading the diagram. I just found this out about an hour ago. Im sure that was my problem.

Instead of two lines sucking on the EGR vlave there was only one which would caused Insufficient flow. And i am praying that the Lean problem will go away because of this mistake as well.

[beatums]

so i'm about to install this beast and i can't figure it out. i've read this entire thread. looked at the pictures. my TB looks totally different. can somebody tell me what is up with this TB? mine seems to have 2 of these cruise control things on it, these 'bell' looking things. it also has 2 TP sensors. WTF??





hopefully i only need 1 TPS because i broke the other when i removed it from the junkyard 'mante

[White Knight]

^ we had a little discussion on those somewhere and i'm pretty sure that that one won't work, i've made the mistake of buying one before

[Tx4Codeman]

^ I have one of those myself. On my 3.5 TB I was able to remove the cruise control bracket without any issues. Unfortunately the one pictured above disassembles differently and when removing this bracket actually removes the throttle cable arm with it. I'm damn near close to taking a grinder to the thing and making it work

[Spawnamus]

ok guys so I know I need to remove the cruse control on the throttle body, but it looks like if I take it off, one of the springs for the throttle will come off and maybe even the whole throttle assembly. My question is do I take of just the vacuum piece on top, or the whole bracket. I took some pics, advice would be appreciated.

[drunkoffjuic]

what year is that from. I have never seen a brown IAC

[Tx4Codeman]

Originally Posted by Spawnamus

ok guys so I know I need to remove the cruse control on the throttle body, but it looks like if I take it off, one of the springs for the throttle will come off and maybe even the whole throttle assembly. My question is do I take of just the vacuum piece on top, or the whole bracket. I took some pics, advice would be appreciated.

You do remove the whole bracket. One spring will be loose. Only removing the vacuum portion from the top still will not help clear the firewall.

[Spawnamus]

Originally Posted by drunkoffjuic

what year is that from. I have never seen a brown IAC

Im unsure of the year exactly, but it is in between the 99 and 04 body style.

You do remove the whole bracket. One spring will be loose. Only removing the vacuum portion from the top still will not help clear the firewall.

Thank you, much help.

[Unyquez]

Hey quick question, I have the 97 diamante mani and tb on my clipse, anybody know where to buy tb shaft seals? Called Mitsubishi they didn't have them, called a lot of ppl . If you don't know what there are there these two small circular seals that blow on evos a lot

[Scooby00GT]

Spawnamus, I don't know if you have traction control on your car but from what I've read the nipple on the top of the TB that has a "P" in line with it is for traction control. I believe you should plug that unless you're using traction control. Also, before you remove that bracket you should just try to see if it fits with it on, because on mine the bracket fit just fine. Good luck on the install.

[Spawnamus]

Originally Posted by Scooby00GT

Spawnamus, I don't know if you have traction control on your car but from what I've read the nipple on the top of the TB that has a "P" in line with it is for traction control. I believe you should plug that unless you're using traction control. Also, before you remove that bracket you should just try to see if it fits with it on, because on mine the bracket fit just fine. Good luck on the install.

Ya no traction control, I will try it with the bracket on it. Today I was looking at my 72 throttle body and it has the the same bracket but with a angle in it, I'm wondering if it will transfer (just to have a complete look). I am taking the throttle body to get a quote on having it polished, so it will prob be a few weeks b4 I install. Once I do I will post some pics of it.

[Tx4Codeman]

Originally Posted by Spawnamus

Today I was looking at my 72 throttle body and it has the the same bracket but with a angle in it, I'm wondering if it will transfer (just to have a complete look).

I thought the same thing, but it seems the length/angle of the bottom of the bracket is different.

[Spawnamus]

Originally Posted by Tx4Codeman

I thought the same thing, but it seems the length/angle of the bottom of the bracket is different.

Oh, that sucks, maybe I can find some short bolts or something to put in those holes.

[Unyquez]

No one knows where to get throttle body shaft seals for the diamante throttle body? 97

[PharmEcis]

Same as EVO.

Type U stand for Ugly?

[Unyquez]

Originally Posted by PharmEcis

Same as EVO.

Type U stand for Ugly?

Same as evo? Well I have the 97 3.5 diamante tb, will the evo seals still work? And no lol stands for Unyquez aka unique lol

[Unyquez]

Originally Posted by PharmEcis

Same as EVO.

Type U stand for Ugly?

[Unyquez]

Originally Posted by PharmEcis

Same as EVO.

Type U stand for Ugly?

So trying to confirm that this is what your telling me.
Throttle body shaft seals in the 3.5 diamante tb and 3g eclipse tb are the same as the seals in the evo? All years?

[Unyquez]

Originally Posted by PharmEcis

Same as EVO.

Type U stand for Ugly?

Thnx bro it worked

[Silvertune]

I've pulled apart my 74 throttle body. Just a few questions and findings.


The TPS, is my concern.


Clearly the 3g TPS won't work with this double peg rotator so I will have to wire it up. It looks like it has the same plug... but does it? And if it doesn't, how do the wires match up? I believe this was discussed earlier in this thread but the pics don't load anymore so I can't see what they're talking about to make any sense of it.

For anyone building this tb who wants to do the coolant bypass, you can remove the nipples too for space. Its very difficult but you put the nipples in a vice and start turning until the pressed fit comes apart.

[drunkoffjuic]

IAC does not work. Look at the connector.

edit: now i understand what your saying.

[Tx4Codeman]

The throttle position sensor of the 3.5 tb has to be used. The connector from our 3.0 harness does plug right in though.

[Silvertune]

Solid and solid. Thanks gentlemen.

[Silvertune]

Just want to correct my info, the IAC I was referring to as fitting was actually from a 6g74 according to part numbers. Just got switched around in the wrong parts box so it's my bad.

[Z1]

Do you guys "flow" your 74 TB's? By flowing, i mean remove those steps inside.
Not sure if it relates to manuals, but with my auto it fixed the horrible hesitation on take-off.

[Silvertune]

Some guys do. Problem is its hard to find a good shop around here to do it. I just cleaned the steps up a little so they're smooth.

[k0r3n_ooh]

Hey guys. So I have had the diamante intake plenum installed with no codes for over 6 months now and I got around to buying and installing the diamante throttle body. (since my IAC was failing it was a easy purchase) The install went fine but I would highly sujest that you have 100% working motor mounts (ie not broken or cracked) My motor sat too high and too far back that the map sensor actually cracked in half and dead shorted against my strut bar and the cruise control would rub the firewall. After my beautiful and pregnant fiance helped me install my Prothane motor mounts... The engine sits perfectly. There is a nice gap at the top and back of the engine and nothing rubs. Prothane motor mounts make the full diamante setup go in with almost no modifications except splicing. That is where i am stuck. I am a electrician so i am a little baffled that I am having issues with this. I spliced both connectors. I am not having a IAC issues but am having problems with the TPS signal.

Originally Posted by drunkoffjuic

OK guys, got a lot of info for the TPS. There are some things we already knew, but with some other info

Stock GT/GTS connections:
(1) Ground
(2) Blank
(3) TPS Output
(4) TPS Power

Diamante connections:
(1) Ground
(2) Closed throttle position switch
(3) TPS Output
(4) TPS Power

Now the Closed Throttle Position switch is something that comes on a diamante that does not have TCL.

The proper way to install the diamante TPS is as followed:
-Install the sensor so that the connection is facing the intake tube (not the manifold)and rotate sensor counter-clockwise.
-Tighten the sensor with one screw.
- Use a multimeter between terminal 4 (TPS Power) and terminal 3 (TPS output). Check that the resistance increases gradually as the throttle valve is opened slowly to the fully open position.
- And because we do not have a connection for TCL, we need to check the continuity between terninal 2 (CTP switch) and terminal 1 (ground) of the TPS at both fully closed and fully open.
- When fully closed there should be continuity, when fully open there should be no continuity.
- if there is not continuity when fully closed, lossen the screws for the TPS and turn counter clockwise and check until there is continuity.
- Once the sensor is correctly calibrated, tighten the screws fully and connect the TPS to the Stock GT/GTS pigtail. They are the same connection.

I have done all of this but there is a problem with the continuity between 1 and 2. and It does not output any signal using a scanner. TPS% reads 0 even at full throttle. Help! I did splice all the correct wires together and keep checking every day.

And on a side note... when i put it in sport-tronic of course it bypasses the restrictions that the codes trigger when the tps fails....Man does it hall balls. Throttle responce is much more solid. God I love the way she purrs now. specially full throttle through 1st and 2nd going through tunnels. (cant even imagine what a full exaust setup will sound like later)

Thnx for your time.

[k0r3n_ooh]

I think i have it all figured out. my eclipse wiring has pins 2 and 3 flipped compared to the diamante tps. so since i spliced the wires across color for color i actually had 2 and 3 flipped. I now have the wires swapped and the car seems to run perfect!

So if you just use the eclipse tps harness and DO NOT splice the wires... You will be set if you leave the original tps harness. If you cut the wires the two inner data wires may need to be flipped.

I now do not have a check engine light p0104 low throttle position. There is a slight issue with my idle but I need to tune the idle screw, throttle cable, tps because they are all out of wack and not adjusted since i took everything fully apart and cleaned.

[drunkoffjuic]

Glad i could steer you in the right direction.

[Silvertune]

That last 3 times this swap was attempted people fucked it up because this thread is a giant ball of conflicting information so I will summarize is ALL right here so there is no more confusion.

6g74 throttle body swap cliff notes:
Disconnect battery
Must be a none traction control throttle body (TCL tb's have 2 giant bells on them)
6g72 or 6g74 throttle body bolts will work
Must use a 6g74 throttle body gasket
Must be on a 6g74 manifold (or a spacer to give it a proper sealing surface)
Coolant lines are plug and play (if you want them..)
6g74 IAC must be used, 6g74 IAC pigtail MUST BE SOLDERED IN
6g74 TPS must be used but the factory connector plugs right in, NO NEED TO SOLDER

Point of significance: Earlier 6g74 throttle bodies came with 2 vacuum ports on the top like your factory throttle body did. If yours have the orange IAC it'll have 2 vac ports and the vac lines are a direct transfer. Some later 6g74 throttle bodies (that came with a black IAC) have THREE vac ports on top. You must look at your 6g72 throttle body to find out where each vac port leads to (before or after the throttle body) and match them to the correct port that leads to the same place on the 6g74 throttle body. THIS MUST BE DONE CORRECTLY OR YOU WILL THROW CODES AND NOT IDLE RIGHT. Its very easy, just look and check your work. On the 3 port throttle body 2 go to manifold vacuum and one goes BEFORE the butterfly and thus is the cause for idling issues since these ports help control your EGR. Unless you need it (boost accessories perhaps?) you can plug the extra port.


IAC wire up is straight forward; the PINOUT is identical, only the size of the plugs are different. So, take the orientation of the factory plug and place the 74 IAC plug in the same orientation. Transfer the wires one by one so they control the same pin. USE SOLDER AND SHRINK WRAP, this is an extremely active set of wires and no interference will be tolerable so do a good job and make it look nice.

Once you reconnect the battery let it idle up to heat so it can figure itself out and just be aware that it'll be tweaking a little bit the first couple times you drive it. Beyond that, enjoy the throttle response and extra ponies across the entire rev range!


Edit: Forgot to mention, if you want to use your cruise control you will have to "move" a small section of the firewall back via pounding tool to make room for it as it does not clear. There's room to do the moving, the only way you'll really notice it is if you seriously screw up sheet metal or don't patch up the paint.

[SvenHoek]

AWESOME summery Silvertune. All the mess that this thread has become, boiled down into a clear and concise summary. Props to you.

[White Knight]

well, he just earned a green nugget.

[KJF5nutral]

i just installed a 74 manifold from a 2002 Diamante, which has an extral vacume line in the back... had to be seald now the car turns off , unless you give it a little gas... but we will see tomorrow....also i have an extra manifold if anyone is interested

[mttg86]

Originally Posted by Silvertune

Must be a none traction control throttle body (TCL tb's have 2 giant bells on them)

So the tcl option/system is deleted with this swap...?? are we loosing handling and traction with this swap...??

[dustin560]

got my 74 intake and manifold on No problem didnt dent fire wall or cut any away hasnt hit yet. did turn egr tube into breather... one problem im geting code p0104 for tps sensor. car runs fine but idle rpms drop low then car dies im runing stock wires on the 74 tps think the tps is bad guys? pics a little shaky but its i was in a hurry ill get a better pic after work today




Uploaded with ImageShack.us

[drunkoffjuic]

Your right. It does fit without denting the firewall. But over time you will hear that TB hit the firewall. I know, it happen to me. The dent is a buffer.

[dustin560]

Originally Posted by drunkoffjuic

Your right. It does fit without denting the firewall. But over time you will hear that TB hit the firewall. I know, it happen to me. The dent is a buffer.

Alright ssorry looked like most people said they dented it for cc or to make it fit any idea on if my tps is bad u think I have a spare but its off a tb with traction control has a extra pin

[drunkoffjuic]

Originally Posted by dustin560

Alright ssorry looked like most people said they dented it for cc or to make it fit any idea on if my tps is bad u think I have a spare but its off a tb with traction control has a extra pin

Yeah, some poeple had problems actually putting the TB on, some didnt. I didn't, but hear the CC with the firewall. Once i dented it in the knocking went away.

As for the TPS check this out:

Originally Posted by drunkoffjuic

OK guys, got a lot of info for the TPS. There are some things we already knew, but with some other info

Stock GT/GTS connections:
(1) Ground
(2) Blank
(3) TPS Output
(4) TPS Power

Diamante connections:
(1) Ground
(2) Closed throttle position switch
(3) TPS Output
(4) TPS Power

Now the Closed Throttle Position switch is something that comes on a diamante that does not have TCL.

The proper way to install the diamante TPS is as followed:
-Install the sensor so that the connection is facing the intake tube (not the manifold)and rotate sensor counter-clockwise.
-Tighten the sensor with one screw.
- Use a multimeter between terminal 4 (TPS Power) and terminal 3 (TPS output). Check that the resistance increases gradually as the throttle valve is opened slowly to the fully open position.
- And because we do not have a connection for TCL, we need to check the continuity between terninal 2 (CTP switch) and terminal 1 (ground) of the TPS at both fully closed and fully open.
- When fully closed there should be continuity, when fully open there should be no continuity.
- if there is not continuity when fully closed, lossen the screws for the TPS and turn counter clockwise and check until there is continuity.
- Once the sensor is correctly calibrated, tighten the screws fully and connect the TPS to the Stock GT/GTS pigtail. They are the same connection.

I am about 90% sure the TPS from the TB with traction control will work just fine.

[dustin560]

Originally Posted by drunkoffjuic

Yeah, some poeple had problems actually putting the TB on, some didnt. I didn't, but hear the CC with the firewall. Once i dented it in the knocking went away.

As for the TPS check this out:


I am about 90% sure the TPS from the TB with traction control will work just fine.

Very helpful thanks man ill check mine out after work I didn't put mine in right I didn't put in away then spin it

[dustin560]

now after fixing it i have no tps code but after 20 miles ses came on for p1400 and p0174. Car also has no top end power drives fine, shifts fine, at 45 I go WOT and the rmps go like i am but the speedomiter barrly moves. any ideas? the ruber of my intake was bent a little i fixed it now and still no power. any ideas? was fine before the swap..tomarrow ill check vaccumes and for leaks in the gaskets.

[dustin560]

problem fixed who knew you had to torq intake manifold bolts stupid mistake did the first time without a torq wrench

[tomsgtr]

I was doing research on the throttle body differences since mine has 3 nipples and some people only have 2.

From All-Data, The three nipple throttle body came from a 1997 Diamante ES 3.5L and from 98-up, It came with a 2 nipple.

If you bought a diamante manifold + throttle body. If it has 3 nipples on the throttle body, you will notice that the manifold doesn't have 5/16 nipple next to the throttle body (usually for the EVAP purge solenoid).. then you got the manifold from a 1997.
The 1997 Diamante used a different size EVAP purge solenoid with a smaller vacuum hose that connects to the throttle body (port P).

If you have a manifold that only has two nipples on the throttle body, you got a later model 98+ throttle body and you have that 5/16 nipple of the manifold for the EVAP Purge Solenoid.

Some people might have issues if they bought a manifold first, and bought a throttle body at a later date.

So if you were planning to upgrade the intake manifold and throttle body. Buy the 98+ Diamante Manifold + Throttle Body.

If you bought a 97 intake manifold and throttle body (like I did),

You have a few options for the EVAP purge vacuum routing.

1. You will have to cap off the (port P) on the throttle body, drill into the manifold and add an additional vacuum port that will fit a 5/16 hose.

2. Cap off (Port P) on the throttle body
Install a "T" the EVAP purge into another vacuum source.
(It may work, it may not, depending on the vacuum source)

3. Don't cap the (Port P) vacuum port on the throttle body
Run the 5/16 hose from the metal line on the firewall to the EVAP Purge solenoid, 5/16 hose out of the EVAP purge solenoid and install a vacuum hose reducer to a smaller hose and install that line in the Port P of the throttle body.

Hope this information helps someone.