Question about 1987 Ford Mustang

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87 2.3l Mustang 275,000 miles. Rebuilt motor, new cam and bearings pistons, connecting rods, bearings, sensors all around. Engine runs great when weather is cold/cool, high idle when weather is hot. High idle is 3000 rpms. Sometimes I can kick the accelerator pedal, and idle will return to normal, other times not. There is no binding in the accelerator cable or cruise control.

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  • ralph_e_meig Sep 14, 2010

    The ISC was replaced with all the other sensors. It could be defective out of the box.

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Sound like you could have a defective ISC (idle speed control) sensor.

Posted on Sep 14, 2010

  • Alexander Mimun
    Alexander Mimun Sep 14, 2010

    Yes, it's happen before here at my repair shop, we have had bad luck with Autozone part (sensor's), don't know where you got your part from, but just a little info, don't forget to rate, good lick.

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