1993 Pontiac Grand Prix idles weird

1993 PONTIAC GRAND PRIX
109,000 MILES • 6 CYL • FWD • AUTOMATIC
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TONY77
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  • 1 POST
car idles fine when in park.and when i accelerate it seems fine.but when im coming to a stop the car acts like like its not getting enough gas or air. the engines revs up then calms downs. it does that for a min then smoothes out. acts like something may be clogged. feels like when i slow down it gets a shot of gas then stops then starts then stops.it eventually smoothes out. ive already replaced the throttle position sensor(tps) and also the idle air control valve(iac). can u help me with an idea about what else it could be? thankyou
Apr 11, 2009 at 7:42 PM
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MMPRINCE4000
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  • 8,548 POSTS
Try removing and cleaning the EGR valve, also check fuel pressure with mechanical gauge.
Apr 14, 2009 at 8:06 AM