1999 Pontiac Grand Prix GTP with the 3.8 series 2 supercharged and I need help crank but won't start

Asked by Gtptyler Nov 18, 2018 at 07:58 PM about the 1999 Pontiac Grand Prix 4 Dr GTP Supercharged Sedan

Question type: Maintenance & Repair

Hi I have a 1999 Pontiac Grand Prix GTP supercharged I had it for about 3 years
it's ran perfect then one day came out to start it and it would turn over but not
fire then I waited a couple of days then tried it again and it fired right up then I
turned it off and it would not fire up again a turns over but doesn't fire I've
replaced the crank sensor the cam sensor I've had AutoZone scan my ignition
control module and they said it's good I've done spark plugs and wires just put
in a new mass air flow sensor the only thing I haven't done yet is changed the
coil packs but everybody that I talk to cuz it's not the coil packs I have no idea
what to do now if anybody has any ideas I would really appreciate it

2 Answers
145,375

T_S_T answered 6 years ago

Even thoe the ECM checked out doe,s not mean it does not have a issue,pontiac is bad for this,you may need to replace the ECM seen this issue in other grand prix,and yes the ECM showed to be good also,but was not.After new one installed no more issue,s.

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