Trying to find an air/vacuum leak on my Ed30. When i switch the car off, there is a high pitched sqealing noise coming from somewhere in the engine bay. It lasts for about 2-3 seconds, I think its related to the brake servo/vacuum system but can't locate exaclty where the noise is coming from???
Also, since the noise has appeared, the engine revs have started to increase to their on tickover..
Should air be hissing coming out of the little hole at the top of the pcv disc? When i switch the car off, there is alot of air pressure being released from this little air hole?
