Noise when letting off the gas! Low Boost. wastegate? dv? n75?
#1
Noise when letting off the gas! Low Boost. wastegate? dv? n75?
Car: 1998 a4, 136,000 miles, Chipped (APR), APR DV, Carbino intake, millitek exhaust, tp
I only hear the noise when I let off the gas. It is a continuous, fast clicking/vibrating noise like metal vibrating on metal. Also accompanied with a bit of a pssshhh sound.
I also hear what sounds like a air blowing out (quite faint) when I accelerate coming from ahead and to the right of me if I'm sitting in the driver's seat (where the turbo is) - but might be turbo spooling?
After searching, some others said it was for sure the wastegate and I would have to replace the turbo. Is there a way to test the wastegate? Also, could it just be the wastegate actuator, and how would I determine this?
Could this also be caused by a bad n75 or diverter valve? Or maybe just a boost leak somewhere?
I definitely notice a loss of boost, but I don't have a boost gauge so I can't give you any readings. I want to make sure I eliminate any other possibilities before replacing the turbo.
Thanks!
I only hear the noise when I let off the gas. It is a continuous, fast clicking/vibrating noise like metal vibrating on metal. Also accompanied with a bit of a pssshhh sound.
I also hear what sounds like a air blowing out (quite faint) when I accelerate coming from ahead and to the right of me if I'm sitting in the driver's seat (where the turbo is) - but might be turbo spooling?
After searching, some others said it was for sure the wastegate and I would have to replace the turbo. Is there a way to test the wastegate? Also, could it just be the wastegate actuator, and how would I determine this?
Could this also be caused by a bad n75 or diverter valve? Or maybe just a boost leak somewhere?
I definitely notice a loss of boost, but I don't have a boost gauge so I can't give you any readings. I want to make sure I eliminate any other possibilities before replacing the turbo.
Thanks!
Last edited by dantheman733; 04-08-2009 at 05:26 PM.
#2
I definitely notice a loss of boost, but I don't have a boost gauge
Could this also be caused by a bad n75 or diverter valve? Or maybe just a boost leak somewhere?
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03-26-2009 09:31 PM