1993 Pontiac Grand Prix engine not staying started initiall

Tiny
VINCED57
  • MEMBER
  • 1993 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
When starting engine it won't stay running right away. Have to keep excelerator down for about a minute before it will continue to run on its own. Also seems to emit some excess smoke initially. Runs smooth when cruzing but sometimes seems starved for air or fuel when excelerating as it will cough but runs fine when reaching cruzing speed again. My cousin seems to think it is either the fuel filter, or fuel pump that is causing the problem. I would be interested in what your opinion is.
Wednesday, September 2nd, 2009 AT 4:11 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Go ahead and change the fuel filter, if problem persists, then have fuel pressure tested with mechanical gauge. Pressure should be above 40 psi and when you "blip" throttle fuel pressure should increase a few psi.

Also check fuel pressure regulator vacuum line, if gas is present, then the FP regulator diaphram is ruptured and would need to be replaced.
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Thursday, September 3rd, 2009 AT 6:43 AM

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