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i have a 1998 gran am se quad,great engines!im starting to have the same problem,when i depress the gas pedal it stumbles and then all of sudden it takes off.i have replaced the tps(throttle position sensor)but to no aval.unless your engine light is on the tps is ok.now im replacing the spark plugs,air filter,and dumping a bottle of fuel injector cleaner in a full tank of gas.if this fails,im gonna have to check fuel filters on my gran am its easy to get to the filter its on the back axle on the passenger side.and then maybe fuel pressure test.

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Q: My 96 grand am 4cyl hesitates going uphill and when the ac is on and recently started to stall what is the problem?
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