ENGINE SOUNDS UP AND DOWN

2004 Chevrolet Malibu

Tiny

shadim77

January, 11, 2011 AT 4:15 AM

Engine sounds up and down : when I turn it on the engine doesnt sound like one tune, the sound is up and down and even when I drive or stop at stop sign I can the sound is waxing and waning

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1 Answer

Tiny

Jacobandnickolas

January, 17, 2011 AT 9:19 PM

If the idle is going up and down, check for vacuum leaks and check the idle air control valve (IAC). It is located on the throttle body and is responsible for maintaining a steady idle.

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