Contour Enthusiasts Group Archives Forums General Troubleshooting idle problems with 95 contour gl

My 95 countour gl idles fine in park and in neutral, and it is not bad in drive or reverse UNLESS the a/c is on or sometimes even the fan on high will cause the car to vibrate or shake excessively. I'm talking about the rear view mirror shaking, the steering wheel shaking, your teeth shaking, etc. Motor mounts have been replaced, spark plugs replaced, timing belt replaced. Any ideas?????

try and see how's your voltage reading with lights turned on an fan... etc. Sometimes if the battery is "almost" dead it does not act like a bumper between power consumption and alternator charging...

TENSIONER PULLEY!!!!!!!!!!!!!!!!!!!!!!!!!!! 90 bucks for a new one or 25 used or so... I promise you do a search there is a how to check if its bad somewhere around here i am lazy now so i dont feel like typing it out unless you really want me to. This happened to me. good luck