Having some engine trouble.

[e30Matt]

I'm telling you... find someone local and swap ECUs... DSMs like my car are notorious for exhibiting similar problems due to bad caps, etc. on the ECU's board. Try another known good computer and see if it goes away.

[Jand3rson]

I can't believe this, what a pain in the ass. Good luck, Jordan. I hope you'll reconsider not coming to the meet if you can't get it fixed.

[kowalski]

check the TPS

Just make sure that you use a coversheet. :D

JK, man. I hope you get this figured out before Sunday!

nice i was hoping somone would catch that.


did you get the memo peter?

[kowalski]

it really sounds like your fuel presure isn't gettup up high enough to pump enough gas into the engine put a clamp on the fuel return line and see if it will rev up past 6 grand.

[Jordan]

I may have to try that.

[kowalski]

it just may solve your problem, good luck to ya.

[Jordan]

I swapped in a spare 3.0bar FPR tonight. Went out and drove it. Still does it a little, but ALOT less then it did.

4th pulled to redline, far beyond where it just stopped dead before.

hit 138MPH indicated tonight :twisted:

Still isn't 100% though. :|

[Nick325is]

Hmm, so the FPR made it better. I may have to try that out.


Nick

[oh2fly]

Okay, you are getting somewhere. If the car pulls harder at part throttle than full throttle, that means a fuel problem. You are putting in more air at full throttle and the fuel isn't increasing to keep up. See if one of the techs at work has a mechanical fuel pressure gauge you can borrow. Tee it into the pressure hose and tape the gauge to one of your wiper arms. Test drive time!. Pressure should rise under load and drop on decel. Should hit 40 psi under load. If that is fine, maybe a plugged filter restricting flow. You can check flow by jumping the fuel pump relay and aiming the return hose into a container. It should be a healthy stream. Besides pressure, you need volume. The TPS still may be bad, not giving you enrichment at full throttle. I check this by hooking my Vantage up to the oxygen sensor wire and watch the pattern. Thd normal waves switch to a flatline with a number around .800 volts. indicating a rich condition. I have an ecu you can try. Good luck!

[Jordan]

So the car is still freaking doing it. Very annoying.

I checked to make sure both the main fuel pump, and the transfer pumps are working. They are.

I was unable to rest the fuel pressure because the guage I have available to me at work has a stupid GM fitting stuck on it.

I did test the AFM tonight, and came to some conclusions. I'm pretty sure its got issues, and is the likely cause of my problem.

at rest the AFM is showing ~3.50k ohms. It raises fairly steadily up to ~4.70k ohms, just before the spot in question. Once the head goes into this spot it drops to ~0.70k ohms, and in one spot inside it... full continuity.(0ohms)

Here is a large picture of the AFM circut board, the section in question is show larger, and brackets surround it.

http://www.r3vlimited.com/Images/AFMboard.jpg

I don't see how this can not be my problem, seeing as this is the WOT range. Engine suddenly thinks its getting no fucking air, then cuts the fuel to match? Hence why the engine will not accelerate.

Input!

[Jordan]

Well nooo one is replying, just the same.

This was my problem. I bent the heads to contact off the worn portions of the track, and it now pulls hard all the way to redline. Clean and smooth.

Its amazing how much smoother in general the engine pulls throughout the rev range.

[rumatt]

Wow. Glad you got it figured out.

[kowalski]

right on!

[diegom6]

Jordan could you rephrase or someone else this??

I bent the heads to contact off the worn portions of the track, and it now pulls hard all the way to redline. Clean and smooth

I don't understand what you mean and would liek ot know if ever happens to me!

[kowalski]

the throttle positioning sensor right? theres contacts i think he bent them so they would make contact again.