Question about 1999 Ford Mustang Cobra

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1999 Ford SVT Mustang Cobra and a rattling sound

When driving the car already in idle temperature, each time the accelerator is pressed, I hear a rattling sound only while in gears and for a few seconds. Also at times the accelerator reaches 2000 RPMs by itself and it stays there until I press the accelerator once, it comes back down to normal idling acceleration. I checked the cable and its fine.

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  • Anonymous Mar 19, 2014

    Replace tension pulley. Idle pulley. Still have a metal rattle sound at idle. Rev and it is gone. Sound starts 45 seconds after starting. Not consistent. Fan clutch or timing chain?


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As for the rattling sound have you checked the heat shield on the catalytic converter, mine was loose and was causing a rattling sound when it was at idle, and would go away as the rpm's increased.

Posted on Jan 02, 2009

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