Been fighting idling problems in which I was getting random misfire codes. Changed egr coils and just about everything else I had a spare of with no dice....Ended up being a torn wastegate diaphragm. I also have a loud squeal/whine or what have you coming from the intake mani throttle body area. I can not pinpoint it. Ives changed egr valves and the sound is still there? Any ideas? Maybe throttle body vac leak or injector seals? Its very high pitched. Vac is around 20 in mg and the car sounds like random misfires as its a bit choppy. Any ideas are greatly appreciated. Thanks in advance!
