SOURCE: noise while turning when accelerating
Probably a, or both front CV (constantly variable) joints in the front half-shafts (the driveshafts that run from your transmission to both your front wheels) are going bad. Not a too uncommon problem. They run about 150-160$ Canadian dollars a piece for remanufactured front shafts (from NAPA Auto Parts). Not too sure about labour cost, could be a few hundred dollars.
SOURCE: Audi a4 fault
My guess is throttle body, it happened to me. Try cleaning it beacuse its 700 installed.
SOURCE: Car shudders when accelerating...
get it put on a code reader and see if there are any codes first,this may lead you in the right direction rather than do a guesstimate
SOURCE: Car shudders when accelerating...
My wife's 02 Audi A4 1,8t had the same problem after talking with Audi (coil pack/spark plugs) we replaced them all and the problem still persisted not to say that won't fix your problem but what I found to be the problem was 3/8 vacuum line (shaped like a S) that comes up on the right hand side between the oil filter and the fire wall that comes from the turbo check valve assembly (its hard to locate and should be done with the engine cool) up to a valve assembly that connects to the intake manifold, what was happening was the hose would become spongy at the bottom (you will have to squeeze the hose from top to bottom to notice the difference) and as the engine heats up it would cause the hose to collapse. Once I replaced the hose and the computer reprogrammed the fuel mixture (about 25 miles of driving) the problem seems to have been correct. Good luck.I had also replaced the turbo check valve about three years ago because of a severe hesitation when you first apply gas (turbo check valve may not be the proper name.) Sorry. Wife Still Loves Her Audi
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