I recently purchased a 98 Grand Am 2.4 twin cam. I know, but it's just to drive in the winter. Anyways occassionally the idle will drop and engine will want to die when coming to a stop, when the engine is cold or hot. Other times when coming to a stop the engine will rev to about 2,000 rpm with the foot on the brake at a dead stop. However, sometimes I can drive it for a weak without any problems. NO ENGINE LIGHT/NO CODES STORED IN MEMORY 120,000MILES Any suggestions or help is appreciated, Thanks in advance.

 

Throttle position sensor