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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1685
Experience:  GM Grand Master Technician 2007. 14 year experience.
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I am working on a 1997 GMC suburban. I just replaced the

Customer Question

I am working on a 1997 GMC suburban. I just replaced the fuel pressure regulator and it was running great. I filled the tank and now it keeps stalling or cuts out when I am driving it. I am wondering if it could be the gas or the ethanol in the gas. I checked the fuel pressure and it was right at 50psi. It even stalled briefly when it was idling but the pressure didn't change on the gauge.
Frustrated,
Derek
Submitted: 8 months ago.
Category: GMC
Expert:  david craig replied 8 months ago.

Hi Im David. what was the reason for replacing the fpr in the first place if i may ask?

Customer: replied 8 months ago.
That is a good question I measured the pressure at 40 PSI and so I went to replace the fuel pump and found that the fuel hose from the fuel pump to the metal line had ruptured in the fuel tank I replaced the fuel that fuel line and check the fuel pressure and now it was a hundred PSI at that point I change the fuel pressure regulator which brought the fuel pressure back down to 50 psi
Expert:  david craig replied 8 months ago.

was it running rough and thats what led you to replace it ?

Customer: replied 8 months ago.
It was having difficulty starting
Expert:  david craig replied 8 months ago.

so its starting ok now? but cutting out at times?

Customer: replied 8 months ago.
Expert:  david craig replied 8 months ago.

you're going to need to monitor the engine while driving and capture the data with freeze frame when the fault occurs. otherwise we're just guessing.

Customer: replied 8 months ago.
Ok, I will give that a shot.
Thanks
Expert:  david craig replied 8 months ago.

you bet

Expert:  david craig replied 8 months ago.

any update?

Expert:  david craig replied 8 months ago.

hello????????

Customer: replied 8 months ago.
I put a couple bottles of heat in it and for a couple days the effects where mostly gone, now the effects have started coming back.
Expert:  david craig replied 8 months ago.

did you monitor the engine while driving? with a problem like this, its pretty much the only way we are going to be able to see what is happening to everything when it occurs

Expert:  david craig replied 8 months ago.

do you still need assistance?

Customer: replied 8 months ago.
I am working on some other projects for the time being, Thanks for your help.