Hi I just purchased 2001 model v70 wagon and I noticed this morning it seems to be making a whistling noise and I can't pinpoint from exactly where but when I accelerate it seems to go away but it idle it's quite a loud whistle any help would be appreciated thank you
When an engine accelerates, it actually lowers vacuum, and on deceleration & at idle, vacuum increases. As you have those conditions, just get a piece of tubing, stick one end in your ear and move around the idling engine to find the leak. It's probably a connection that came loose or a damaged vacuum line. Either is easy for anyone to fix.
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