2G Fuel pressure issue. . .

[TSITurbo95]

Ok, so my car started to lean out soo much up top that it would basically die. So I checked my base fuel pressure and it was low, so I tried to adjust it, but it would not adjust up or down. So I bought a brand new aeromotive, and it is giving me the same issue, fuel pressure will not increase nor decrease. Car starts and drives fine, except when in boost. Suggestions?

 

[gofer]

Check/replace your fuel filter, if that doesn't fix the problem the fuel pump could be culprit.

 

[TSITurbo95]

Changed fuel filter and still same issue. New pump on the way, and I will report back.

 

[Alex7747]

Also something to check would be the voltage at the fuel pump.

 

[gofer]

It's also possible that the fuel return line, that goes from the fpr to the tank, is kinked or clogged.

 

[TSITurbo95]

^ Return line is not kinked or clogged. Funny thing is, my car was running fine up until this happened. I did not change a thing.

Still wondering why the fuel pressure wont decrease, this is causing me to lose sleep. The pressure should at least lower, correct?

 

[TSITurbo95]

Installed new pump and noticed the seals were all cocked and sh!t (this had to be the problem) but I went ahead and replaced the pump anyways. Now, I can change fuel pressure, HURRAY! But damn, it can never be that simple, now my base fuel pressure is set, however, my wideband reads very lean at idle, and has trouble staying running. Culprit?

Update, when I disable inj 2 or 3 idle changes very little, but when I change 1 or 4 it changes significantly.

 

[gofer]

Spark?

Pull the rail, leave the injectors in, and set a 5 ga bucket on your valve cover and aim the injectors into it. With someone cranking the car, peak your head in there and watch the injectors to see if they're pulsing.

 

[TSITurbo95]

I can't get my rail that high (not enough braided hose) :/ And yes I am getting spark. Funny thing is, this only started to happen since I changed the pump and seals. And yes it's correct.

 

[gofer]

Then test the injector resistor pack and injectors themselves with a multimeter.

 

[TSITurbo95]

Tested, both are in spec and dead on. I am soo lost .

 

[twicks69]

Have you checked the injector filters to see if they are clogged?

 

[Abe'sGST]

+2 on clogged up injectors

 

[TSITurbo95]

Changed injectors to Evo 550's and now its a lot better, but still stumbles a bit. So I disable my MAF and use SD, and it's fine. Its like one by one something is quitting on me. It all started to be a fuel pressure issue, and is now a damn chain reaction.