Mechanics

CHEVY START UP

1998 Chevrolet Silverado

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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Whoomba
August 25, 2009.



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

Rasmataz
Aug 25, 2009.
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
Whoomba
Aug 28, 2009.
The fuel regulator is integrated into the CSFI unit its inside the intake manifold/plenum

Rasmataz
Aug 29, 2009.