Having problems with your 1992 Chevrolet Cavalier ?

My car reves very loud when I put it in park

\015 I have a 1992 chevy cavalier 4 cyl and after coming home I notice when I put it in park it revs loud as if I was pressing on the gas & if I'm parked for a while somewhere it begins to make a rattle noise from the back area\015 Posted / edited by AnonymousUser on : 21-09-2020

Answers :

The rattle is probably an exhaust pipe rattling on the axle or a heat-shield ready to fall off. Remove shield completely or put a hanger to take exhaust off of the rear axle.\012

The rev increase is probably the throttle positioning sensor or the Speed Sensor.
Prior to replacing you should check the wiring carefully for frays and breaks near the ECM (Computer) or a vacuum leak on the engine somewhere.

If your ECM is behind the passenger headlight at the bottom then it is exposed to the weather and the brackets holding the ECM get loose or it moves around and frays the wires in this location leading to the ECM or the connectors to the ECM get corroded.  Carefully inspect these and replace that part of the harness - One may even get a long harness piece and move the ECM to the top of the Engine out of the weather elements.
Hope this helps.
East Coast Canada Rocks!
Repair Help & Product Troubleshooting for 1992 Chevrolet Cavalier

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