gjewers Posted May 3, 2008 Share Posted May 3, 2008 Sounds like a vacume leak but maybe not...When in the cab and driving, the whistling starts when braking (and it sounds like brake squeal) but it continues when stopped. When accelerating it goes away. When looking under the hood, it starts when the motor is idling but goes away when you gas it a little and does not come back. Seems to have something to do with RPM. Sounds like it is somewhere between the valve cover and the fuel injection stuff but can't pin-point it. Pulling the PCV valve or opening the oil fill cap makes no difference except for the change in RPM with the PVC valve. It did not do this when the rig got started from a cold start but started after going down the road a few blocks. Do I have ghost in theis rig? Thanks again and again. gj Quote Link to comment Share on other sites More sharing options...
Maineah Posted May 3, 2008 Share Posted May 3, 2008 Does it change any when you apply the brake? Try just touching the brake (with the engine running) or push it hard and see if it changes (you do not have to be moving) I’m thinking you may have a brake booster vacuum leak, that will give you a wicked squeal. Quote Link to comment Share on other sites More sharing options...
gjewers Posted May 4, 2008 Author Share Posted May 4, 2008 Thanks. I'll check that out and let you know. Quote Link to comment Share on other sites More sharing options...
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