After googling this problem and no clear answers turning up, I've decided to see if anyone here can help me?
Our 2002 Automatic Grand Prix GTP supercharged coupe loves to stall/shut off on the road- usually when we are moving.
The Tachometer bounces up and down rapidly, then the car just gives out. It all happens very quickly and quietly. There's not a great deal of sputtering or rumbling.
At first we thought we were noticing a pattern in when and where the car would shut off: First we thought it only occured when coming to a stop, then we thought it was happening on inclines. However every time we think we've found a common denominator, the car just proves us wrong. Turns out it happens incline or not, and can happen while accelerating, coasting, or breaking. The most recent time it happened was in the middle of an intersection while accelerating. Other times it's happened while approaching stop signs, and merging onto a ramp or highway.
Here's the kicker: The car already has a ton of things wrong with it. The gas gauge is broken (always shows a full tank), so the check engine light was already on before this stalling problem started. In fact it's been on for over a year- (only because we never saw the need to fix the gas gauge as the elctronic display on the console shows fuel usage... and well we don't have a lot of money.)
We're coming to terms with the fact that the fix could cost more than a replacement car... I'm sick of this death trap of a car but we're not in a position to buy another one, especially since we wouldn't feel right selling this car for anything and it would be a total loss. Do you know what could be wrong with it? And do you have any idea how pricey the fix would be? Please help!