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I have an '87 300zx non-turbo manual trans. I have had it only a week. After about 4 days there seems to be a ton of excess air coming from the engine. It sounds a lot like a massive trailer truck. The noise is consistent. It's there everytime I drive the car. Sometimes it's high-pitched. I've gotten the fuel filter replaced and a full service oil change. I checked under the hood and everything is in good order. Any thoughts? Please!?

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There sounds to be a massive vacuum leak, check all hoses coming off the intake manifold rap your hand around each one to see if the leak gets lower this will help you find it. this is what i think the noise is.

Posted on Jul 10, 2010

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