Diagnosis for Whistling noise - ZR-1 Net Registry Forums

XfireZ51 · 07-30-2009

While driving Tuesday, I noticed a high pitched whistling noise during the times I was idling and/or sitting at a light. Did not change pitch with engine rpm and was not present when cruising. Closed throttle is when it is at its loudest. I pulled apart air horn/throttle body and spotted what I thought were telltale signs of an air leak on the gaskets. Installed new gaskets, buttoned every thing up and started car. Same whistle. Difficult to locate as it almost seems to be coming from everywhere. However it does appear to be more pronounced towards the front of the motor. Anybody else ever run into this. Car appears to idle and run fine. I still suspect a vacuum leak of some sort.

07-30-2009	#1
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,683	Diagnosis for Whistling noise While driving Tuesday, I noticed a high pitched whistling noise during the times I was idling and/or sitting at a light. Did not change pitch with engine rpm and was not present when cruising. Closed throttle is when it is at its loudest. I pulled apart air horn/throttle body and spotted what I thought were telltale signs of an air leak on the gaskets. Installed new gaskets, buttoned every thing up and started car. Same whistle. Difficult to locate as it almost seems to be coming from everywhere. However it does appear to be more pronounced towards the front of the motor. Anybody else ever run into this. Car appears to idle and run fine. I still suspect a vacuum leak of some sort.