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1998 Pontiac Grand Prix GTP

Tiny
CHRJAY
  • MEMBER
  • 1998 PONTIAC GRAND PRIX
3.8 supercharged, 120000 miles

checked ignition control module- good
replaced fuel pump and fuel filter
checked fuel pump relay-good
fuel pressure decreases after start up


when car is started, will idle for about 2 seconds, then begin to sputter, then die all together

when engine is off, key turned to ON fuel pressure then comes back and holds steady.
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Thursday, April 5th, 2007 AT 5:54 PM

2 Replies

Tiny
MCFERRANCE
  • MEMBER
  • 100 POSTS
Just a note about my experience.

Some ignition modules have separate start and run circuits which will make it start then shut off when the key is released to "run" postion. In my experience with this, the module tested ok even though it was bad.
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Friday, April 6th, 2007 AT 2:28 PM
Tiny
CHRJAY
  • MEMBER
  • 2 POSTS
Thank for the help. Talk to a gm tec he said go git a fuel pump res kit. It use on gtp for pump sec speed. The run about $60. You put the new one on the firewall
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Friday, April 13th, 2007 AT 12:30 PM

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