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I would suspect a weak EGR valve. It should be toward the rear of the motor. Take a non or low flammable spray (WD40) and spray on or around the valve and on and around the seals and if the engine smoothes out that is where the problem is. A severe vaccum leak causes a lean condition which in turn causes the problem you have. Also spray around the hoses, gaskets, etc.

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โˆ™ 2006-03-25 15:02:04
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Q: What would cause a 1996 Pontiac Sunfire to almost die when at a stop light or when idling?
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