Question about 1997 Pontiac Bonneville

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Stalling and no power... please help

Ok I have a 1997 Bonneville 3.8 no turbo. So this car used to run like a champ. best car i ever had until one day it turned off goin up a hill. we have the tranny rebuilt just fyi two months earlier. so after tryin to fix the problem for several months we came to the idea that the power windows which are very slugish and sometimes dont move were shorting something out. we have switched the fuel pump in the tank and several other tries later still nothing. Then we cut off the tail pipe infront of the CAT and it drover 20 miles and turned off. It dont stall anymore (unless you try to use the windows) but i can sometimes mash the gass spin tire and everything but othertimes it will cough and i can only get it to go about 30 mph..... any ideas????? please help me out. Thanks in advance

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  • walkerhav Dec 27, 2008

    I have a 99 pontiac bonneville. It had been running great. They all of a sudden it started stalling and quitting on us. We would start the car and then in just a few minutes it would stall out. We tried driving it and we went up the hill to leave our house and it stalled again. Sometimes we could drive it 3 miles before it stalled out. We put premium gas and dry gas in, but no help. We even had the fuel filter replaced, we still have the problem. We haven't been able to drive it for a month now and really need it. Any ideas?

  • yadayada
    yadayada May 11, 2010

    Have you checked the charging system voltage? It sure sounds like you have a low voltage issue, even if the windows are an excessive draw it should not affect the engine, with engine at high idle and all accessories turned on including headlights check to make sure the alternator is putting out at least 13.5 Volts



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1997 pontiac bonneville serpentine belt diagram

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