strange noise at idle?
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Joined: Jun 2007
Posts: 126
From: DFW, TX
strange noise at idle?
I'm hoping somebody can help me out with this...
My car is a 97 SS A4 with minor bolt-ons, when the car is cold or has sat for a while (like in the morning) it makes a strange knocking/thumping noise from the front of the car. It is very noticeable when the car in in gear at a stop light, but if you put it in park or neutral the sound gets very faint. The sound is non-existant when driving. Also, I can feel it through the steering wheel and pedals and it is very sparatic (no rhythm) and the knocks/thumps are very close together (multiple times per second).
Anybody have any idea what it could be
My car is a 97 SS A4 with minor bolt-ons, when the car is cold or has sat for a while (like in the morning) it makes a strange knocking/thumping noise from the front of the car. It is very noticeable when the car in in gear at a stop light, but if you put it in park or neutral the sound gets very faint. The sound is non-existant when driving. Also, I can feel it through the steering wheel and pedals and it is very sparatic (no rhythm) and the knocks/thumps are very close together (multiple times per second).
Anybody have any idea what it could be
Last edited by rjc1629; Jun 15, 2007 at 08:32 AM.
Registered User
Joined: Nov 2005
Posts: 700
From: Center Point, Texas
I've had this happen with every Z28 I've owned. Mine has been where there is a major bend in the exhaust pipe. The bend was moving and tapping the floorboard. I just had another mount added for the pipe. It only did it at speeds below 25mph.
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