Question about 2004 Suzuki Forenza

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Whistling sound around erg valve

Ther is a whistling sound coming from around the erg valve. I have already changed the gasket. It sounds like it is coming from under that area.

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Vacuum leak check hoses cracked broken disconnected unless it's new egr itself diaphram could be shot.

Posted on Feb 07, 2009

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Whistle noise indicates a major vacuum leak. Maybe something loose in the intake system. Maybe a vacuum hose disconnected. Will explain lose of power also.

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This is a symptom of the inlet manifold gasket having a leak.The whistling is air going in through the small leak/hole in the gasket.With the throttle butterfly shut,air is getting sucked in the only way it can.Try tightening the inlet manifold bolts 1st.But more than likely the gasket needs replacing.Hope this helps

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The GM 3.4 v6 engine is known to have Intake manifold gasket failure problems. IMHO, I do not believe this is fuel pressure release valve problem, since you would have fuel leaking. If it is more of a whistle rather than buzzing, i would suspect manifold gasket.

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Whistling noise


You are right. It is air leaking. You either have a vacuum line off the engine, or a leaking gasket in the intake manifold area. It could also be your PVC valve is out of it's grommet in the valve cover. You can locate the leak with the car running by using a mechanic's stethoscope. Just use it WITHOUT the metal pickup rod and diaphragm. Probe the open tube end around areas that sound like they leak or whistle. You can also use a can of carb spray. Just carefully spray around gasket surfaces and when the engine rpm raises, you've found it. Be very careful around a hot engine so you don't start a fire using this method.

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most likely the intake manifold gasket. My 99's went out at 58k. common for the model.

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My 1994 Jeep Grand Cherokee is making a whistling sound. It whistles when I am giving it gas even coasting. But when I slow down, it stops or gets quieter. We changed the PCV valves and hoses for the...


Often a whistling sound, from the engine bay anyway, is the sign of a vacuum line that is leaking. Might want to check all the vacuum lines for cracks and such and make sure they are all connected.

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