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Originally Posted by denglish318ti  Cheers John, that clears things up. Probably wasnt the bypass valve making a squeaky noise under accelleration as it was still doing it when the vacuum line was off.
Thanks. Dylan |
Check your idler pulley. The spring gets weak over time and the SC requires a god idler pulley bearing and spring to keep that belt from squeeking.
Also you will hear a squeak noise when letting off slowly as the throttle body closes it hits a point where the air whistles becasue the SC is pulling hard for air and your choking it off creating a vacuum by closing the TB. This is normal as sounds like a slight turbo spool sound