You went to Davenport, right? They've had extensive experience with big block GMs and the like. I don't think they quite have the hang of imports, yet. You running pretty conservative boost (barely 5 psi you said). The stock kit should have been just fine out of the box. I'm wondering if their A/F pickup was not reading right and they tweaked it rich needlessly.
PS. You have to be careful when you say "I" turned it up. Again, you've lost continuity because some people have not seen your other threads since you start a new one everytime something different comes up with the same topic.

 

I do know exactly how much he turned the FPR though. So do you think I shoudl turn it back exactly to what it was out of the box??


then that would mean I would be at our initial reading of VERY lean.


The only other thing I can think that may have messed something. IS that the boost guage he hooked into teh system, he Tee'd off the FPR.

MAybe that is messing with the FPR as far as adding fuel up top.


I called m ybuddy at teh dealership who installed the kit. He told me to stop by so he can check all teh conenctions and everything. What fuel pressure should I be running at? He' going to check that too. Do I need to drive while checking it?

 

No. There may be other things going on here. Don't mess with it till you find out what those things may be.

This is pretty typical of how to tap in for the boost gauge, however, I elected to keep the FPR line dedicated to only that. I doubt this is your problem. The FPR works when it sees boost. Tapping into that line will only cause a division of that boost pressure or (worse case scenario) another place for a leak to appear. A leak or a lessening of pressure would make the FPR NOT increase fuel pressure. Therefore, this doesn't explain your rich scenario. It would seem your FPR is pushing fuel just fine, if not too much.

This is best option I've heard so far.
I can't tell you what the fuel pressure is under boost. I don't have that number at my disposal, but your tech should be able to at least confirm if the pressure falls under factory specs for non-boosted conditions. You should still him check out the MAP sensor and the ESM.

 

And turning the FPR back to factory setting myself is out of the question?

 

Did they install the new fuel pump?

Almost sounds like something else is the issue - but it could be a bad/defective FPR also.

I would not touch it until you have a wideband on it to verify that you are not damaging your engine

 

Yea I installed the pump that came with the kit.


bad FPR could be a culprit i gues..... How often does comptech ship out bad ones though?

 

Something has changed with your setup. You have no idea what messing with the FPR on your own will do now. A bad idea.

Never heard of one.

 

The only thing that has changed is the FPR....


Got it back last thursday. Drove it perfect for 4 days. Went to dyno on monday. Guy messed around with fpr. Now it drives poorly.


haven't touched anything sicne then. Nor did I drive it hard before he touched it.

 

Yeah man...sounds to me like your car feels like a dog because it's running rich. No, I don't think an EMS is overkill for 5psi...see my sig.
Frankly, I think it's possible the tuner's tailpipe sensor is not reading correctly if it feels like a complete dog. I would consider another tuner...

 

OK, this is where it was unclear. I thought you drove it from the dyno for a little while and it was "OK" and the latest problems started after the initial drive home.
In this case, I would suggest you try one turn and see if it changes anything for the better or worse. Don't go beyond the 3 turns that was done. Maybe go to another dyno facility.