Question about 2006 Audi A4
My 2000 audi a4 is making a erratic humming noise when in park and drive. It started making this noise after I had driven my car in low gear on a windy mountain road. When the car is in park i press the gas and as the car is winding up it makes the erratic noise, when I let go of the gas and it comes back down to idle it sound like it wants to back fire. I have checked all the coil packs and they are working fine. Is this a transmission problem?
Could be a transmission issue. Did you hit any objects while driving ? Have you performed a visual inspection under your vehicle ? Have you checked to see if you have any loose vacuum hoses ? Any codes in your engine control module or transmission control module ?
Posted on Jun 22, 2017
The humming is the central lock vacuum pump running..You either have a leak in one of the lines, or one of the hoses has popped off
Posted on Sep 18, 2009
It's the wheel bearing. Guaranteed. Just replaced mine. Go to Audiworld tech articles for step by step instructions on how to test the wheel bearings. They must have been put in wrong last time or they just went out again.
Posted on Jan 28, 2009
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