Question about 1991 GMC S-15 Jimmy

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Severeal cylinders misfire

1997 Chev 1/2 ton 4x4 several cylinders misfire runs rough, but clears up. Idle speed is very fast, also

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  • Anonymous Mar 13, 2014

    truck begins missing at low idle but clears up at speed afm disabled
    but misfires occuring on afm cylinders

  • Anonymous Mar 23, 2014

    rough idle 5.3 engine misfire cylinder 1

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  • 15 Answers

Sounds like the TPS (throttle position sensor) usually located where the throttle body meets the intake manifold. It may need re-calibrating or renewing.

Posted on Feb 06, 2009

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Posted on Jan 02, 2017

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