CHEVY START UP

1998 Chevrolet Silverado

Tiny

whoomba

August, 25, 2009 AT 4:58 PM

Engine Performance problem
1998 Chevy Silverado V8 Two Wheel Drive Automatic 143k miles

I just recently changed the fuel filter. It was really stopped up. The pressure went from unmeasurable to 45 psi. It has CSFI. Now every time I start it, it stumbles a little and slowly builds up to the proper idle. Any idea what is going on? Thanks

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3 Answers

Tiny

rasmataz

August, 25, 2009 AT 5:17 PM

Your fuel pressure should be 60-66psi being that low 45psi might be causing the problem.

Tiny

whoomba

August, 28, 2009 AT 10:44 PM

Thats good. I thought I read on hear it should be 04 to 50. I seem to be getting good pressure from the pump. How do I test the fuel pressure regulator on a CSFI system?

Tiny

rasmataz

August, 29, 2009 AT 1:19 AM

The fuel regulator is integrated into the CSFI unit its inside the intake manifold/plenum

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