Question about 1999 Jeep Grand Cherokee

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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 vehicle, but the whistling only got worse. What do you think it is?

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If you can get it to whistle at idle, use a peice of plastic tubing, say 1/4 in about 4-5 ft long. Long enough where you can hold one end to your ear (not IN your ear!) and move the other end around your engine compartment. Do some 'sniffing', where it sounds the loudest will be close to the area where your leak is. Replace any hoses that look 'iffy'. Hope this helps.

Posted on Jan 01, 2009

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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.

Posted on Dec 31, 2008

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