Replaced timing belt and put on four new tires on 2002 Audi A4. Now there is a vibration when idling and also between 40-70 mph that feels like engine is running rough, but tachometer holds steady. Vibration occurs going up hilss, going down hills, but sometimes I can find a speed where I get no vibration.
Check out harmonic balancer .
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Hi I am vortash I need you to check something out for me before I comit to what i think it may be .. start the car and set the idle speed at approx 500 to 800 RPM , take a heavy duty screwdiver or a 12" piece of broom handle and hold it against the head . Place you ear on the end of the handle and see if you hear a rumbling ( knocking sound ) or if you feel the vibration .. we need to eliminate some possibilities first . ... Regards Vortsh
car vibrates over 70 mph
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