View Full Version : Help!!!!! Noise

03-11-2008, 02:23 PM
So my 1997 audi a4 2.8 5 speed just had one of the o2 sensors replaced, not long after maybe a week the car started making this strange noise when the car is reved or driving in gear. It sounds like a pump of some sort winds up it sounds the same every time. It is loud sounds like a baby crying. It is getting looked at now and the mechanic says it's not the timing belt not the serpentine belt they can't seem to pinpoint where the sound it coming from. Can anyone help with this problem thanks.