Question about 1999 Pontiac Grand Am GT
I have a 99 Pontiac Grand Am, 3.4 L engine. About three weeks ago we were driving down the road about 55 mph and the car just shut off. It would not start after that. A week before this happened we replaced the plugs and wires because it was kinda missing (if that's how to describe it). The week before that we replaced the throttle positioning sensor because when you we stopped and the car was in gear it would rev way up. That did not fix the problem. Since the car quite we have put new coil packs and a module on it and it did not fix the problem, the car still will not start. and if it even tries the motor shakes and backfires really bad. Can someone please help me. Oh yea now when we turn the key to the off position the trunk pops:( I can live with that though I just need it to run again.
Honestly to me it sounds like a charging problem. Was the vehicle's alternator charging properly? Is the vehicle's battery dead? As you are probably aware, newer vehicles have multiple computers that monitor various functions. Some of these functions rely on only the slightest voltage or need the full 12 volts (actually closer to 14v.) supplied by the charging system. if the charging system isn't functioning properly, then it's very likely that you could experience such issues. Also many newer vehicles will essentially have to relearn how to function if there is a voltage variance issue. Consequently the trunk issue might have something to do with that. hope this helps.
Posted on Oct 22, 2008
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Posted on Jan 02, 2017
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