1997 Pontiac Grand Prix No Fuel Pump Power

PONTIAC GRAND PRIX
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JENNY
  • MEMBER
  • 1 POST
1997 PONTIAC GRAND PRIX GTP 97000 MILES

I just had a new fuel module and 2 relays installed by the dealer for $1700
Now 1 week later I have no power the the pump
I had the dealer diagnose the problem
I get good spark, injector pulse good , egr good everything looks good
I am told the problem is the PCM and now need it replaced at a cost of $2300.
I do not beleive the dealer as I had the old pump tested by a friend an he told me the old pump was good and the fuse was most likely blown

I've had the system tested and am getting no power at the pump all the fuses , wires and relays were tested

Is there an inline fuse I have missed or could my anti theft unit be shutting of the fuel power circuit

Please advise

Thx
Feb 19, 2006 at 1:36 PM
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PEPPERMRJ
  • ✓Experienced Mechanic
  • 1,158 POSTS
I'd be raising cane with that dealer. If he won't make the repair right report him to the better business bureau. Then ask friends, neighbors and relatives for a recommendation on a good mechanic. Not that a computer can't fail but Gee what a coincidence.

Can you disable the antitheft system? Run a new power source temporarily to be sure the pump works and the engine starts.

If it does turn out to be a computer try a junkyard first.
Feb 20, 2006 at 11:45 AM
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Suggested Repair

Challenge the recent dealer repair and get a second opinion from a trusted mechanic. If possible, disable the antitheft system and temporarily supply power to the pump to confirm it runs and the engine starts. If the PCM is confirmed faulty, consider a salvage-yard unit before buying a new one.

Conversation Summary

The owner of a 1997 Pontiac Grand Prix GTP reports no power at the fuel pump one week after a dealer installed a new fuel module and two relays. Spark, injector pulse, and EGR tested good, and the fuses, wiring, and relays were checked. The dealer recommends PCM replacement, but the owner doubts that diagnosis and asks about a missed inline fuse or the antitheft system cutting fuel power. The expert advises disputing the dealer work, seeking an independent mechanic, disabling antitheft if possible, temporarily powering the pump to verify it, and trying a salvage-yard computer if the PCM is bad.

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