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P0300 is difficult to resolve. I haven't had time to troubleshoot it too much lately. I do not think I have any of the problems rep mentioned. I have never recieved it during WOT only when backing off or holding the throttle in the 3500 to 4000 rpm range. Rep, what was your vaccum reading at idle with the cracked line, and if you are using Ripp's FPR what is your fuels pressure at 3500 rpms?

My belt does not slip, I have the Ripp tensioner. But, I have developed a squeak lately. It squeaks until the belt is warm. I have to pinpoint the noise. Any ideas on that rep.
He is using the stock FPR.
Yeah. My po300 happened while I was N.A. and with the stock FPR, so I couldn't see where the PSI level was. Made it more difficult to troubleshoot. I didn't have my boost gauge wired at the time, but once I repaired that hose, I haven't seen a po300 code since.

I'm going to change out the FPR to an Aeromotive, once it arrives. My FP gauge is installed right on my A-pillar pod.

As far as the belt goes, over-tightening can be as bad as being too loose. You may want to loosen or tighten it based on that little 90 degree test.

How she running otherwise?
 
Discussion starter · #242 ·
The car is running excellent!

I did have an incident with a push broom in the middle of the road the other day. I could not avoid it, the handle was facing me and the brushes were furthest away. So I drove stright over it hoping I would get lucky and it would just clear the underneath of the car. But... the front of the bumber must has caught the bristles enough to cuase the stick to raise up and it took one of my o2 sensors out. WHen I stop everything looked good, no fluids leaking. After driving a while my AFR went lean so I limped home and looked closer. The o2 was bent 90 degress. I fixed that and it runs perfect again.

I am very interested in your results with the aeromotive FPR. I think that the stock FPR may be causing my P0300. It sure would be nice to monitor the FPR at that location.

I used to 90 degree method on my belt, but it is squeaking, I will need to check it again. It really sucks when I drive down the street with the belt noise being louder than the SDS.
 
The car is running excellent!

I did have an incident with a push broom in the middle of the road the other day. I could not avoid it, the handle was facing me and the brushes were furthest away. So I drove stright over it hoping I would get lucky and it would just clear the underneath of the car. But... the front of the bumber must has caught the bristles enough to cuase the stick to raise up and it took one of my o2 sensors out. WHen I stop everything looked good, no fluids leaking. After driving a while my AFR went lean so I limped home and looked closer. The o2 was bent 90 degress. I fixed that and it runs perfect again.

I am very interested in your results with the aeromotive FPR. I think that the stock FPR may be causing my P0300. It sure would be nice to monitor the FPR at that location.

I used to 90 degree method on my belt, but it is squeaking, I will need to check it again. It really sucks when I drive down the street with the belt noise being louder than the SDS.
Yeah, no one enough about how well those stock FPR work. The stock pump should be fine to build pressure if the FPR is doing what it should. The 255 Wally is really for higher boost apps. We shall see.

Since you have two fuel systems practically, you may just want to exchange your stock FPR for a new one. It might help and it is easy to do... then again, you can change it out.

As far as your belt, tighten it maybe a little more and see how that works. Sounds like your belt compound needs to warm up before it grabs, and that usually means a loose belt.
 
what kind of AFR's are you seeing. i still have a fair amount of issues with the p0300 code but have tied alot of it to very lean AFRs. for some reason at start up car stumbles and misfires becasue of the lean condition. i have also noticed that the car is also slowly leaning out the WOT settings
 
My AFR's are pretty close to 14.7 at all times during start and idle. Do you have the honeycomb installed in the intake? That really stableized my idle. Do you have the Brat?
Do you still have the car? I thought it was being sold for an airplane.
 
He already bought the airplane. He is now trying to sell the SDS off the car as his daughter gets the car and he lost the rights to have another toy.
 
Discussion starter · #251 ·
Exactly, however things have changed. My wife bought my daughter a 2008 Dodge Avenger. Nice car for a low $20,000 car. So I should be in the clear, right? No, my wife still wants me to remove a toy or two. So, the SDS is still up for sale at this point, or maybe the car. I have a 2001 Ford F-350 for sale and if that sells first I will be in the clear with the wife.
 
My AFR's are pretty close to 14.7 at all times during start and idle. Do you have the honeycomb installed in the intake? That really stableized my idle. Do you have the Brat?
after a 3-5 minute warm up cycle, my AFRs return to 14.6-15.0 at idle, most low throttle cruising AFRs stay around that point. honeycomb is in the blow-off pipe after the blow-off and i am runningthe BRAT. going back to recheck supplemental injectors, and trying to check BB maps for any issues. any other place to look or have over looked?
 
what kind of AFR's are you seeing. i still have a fair amount of issues with the p0300 code but have tied alot of it to very lean AFRs. for some reason at start up car stumbles and misfires becasue of the lean condition. i have also noticed that the car is also slowly leaning out the WOT settings
When I had my po300 codes, it was caused by a vacuum leak. Check the vacuum hose to the FPR.
 
If you are driving the stock VR4 regulator with a walbro I guarantee you are over running the regulator. I did with mine. Couldn't get the VR4 regulator below 50 psi.
 
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