Quote:
Originally Posted by Bianca98
could be a bad idler pulley, could just be the belts, could be there is a small vacuum leak in your intake/intake piping. Could be wheel bearing, could be brakes. Better test would be to have someone else sit in the car while you get out and start poking your head in places to see where the noise is coming from.
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Thank You, good suggestions, the vacuum leak sounds like it could be worth investigating as the sound is only there with slight acceleration only. It doesn't do it when reving stationary at all so is going to be difficult to diagnose as you can only hear it when driving and when left window is down.