Question about Pontiac Trans

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I need to know what the restance is for a knock sensor on a 91 trans am 5.0 litter

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  • Andrew Hart
    Andrew Hart Apr 28, 2010

    okk so wat does it mean when i have a resistance on it?

  • Andrew Hart
    Andrew Hart Apr 28, 2010

    i know how to run code test....know im getting est code....and have changed everything else on it that goes with that code...exept knock sensor and distributor witch i put 1 of them on last year

  • Andrew Hart
    Andrew Hart Apr 28, 2010

    i checked the wireing already its good.....the code id 43

  • Andrew Hart
    Andrew Hart Apr 28, 2010

    how do u torque them and wat is the proper spec

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  • Pontiac Master
  • 75,822 Answers

Knock sensors do not have resistance values, that is not how they work, they are what is called a Peizoelectric sensor, this means when they vibrate from any knocking in the engine from pre ignition/detonation it generates a small current, a Resistance check is not how they are diagnosed, you must read the Output of the sensor with a scanner that reads live data and watch the knock sensor output signal, have been doing this type of diagnostic work for 35 years and i am sure on this.

Posted on Apr 28, 2010

  • 9 more comments 
  • yadayada
    yadayada Apr 28, 2010

    it means the sensor is not open, but it doesn;'t mean it is working properly. all this is showing is continuity through the sensor, this is not useful in diagnosis.

  • yadayada
    yadayada Apr 28, 2010

    do u have a knock sensor code in memory?

  • yadayada
    yadayada Apr 28, 2010
  • yadayada
    yadayada Apr 28, 2010

    EST AND KNOCK SENSOR CODE ARE NOT THE SAME, PLEASE PROVIDE THE CODE TO ME.

  • yadayada
    yadayada Apr 28, 2010

    THE KNOCK SENSOR IS CHEAP, BUT CHECK THE WIRING TO IT 1ST, THEY GET OIL AND ROAD GREASE/GRIM IN THE CONNECTOR AND IT CAUSES SIGNAL PROBLEMS, IT IS LOW ON THE BLOCK

  • yadayada
    yadayada Apr 28, 2010

    OK LET ME DRAG OUT THE FACTORY MANUAL

  • yadayada
    yadayada Apr 28, 2010

    43 knock sensor or electronic spark control circuit fault
    WITH THIS CODE I WOULD HAVE REPLACED THE KNOCK SENOR 1ST.

  • yadayada
    yadayada Apr 28, 2010

    MAKE SURE U TORQUE THE NEW SENSOR TO PROPER SPEC

  • yadayada
    yadayada Apr 28, 2010

    THE SPEC IS 15 FOOT LBS

  • yadayada
    yadayada Apr 28, 2010

    U TORQUE IT WITH A TORQUE WRENCH, NOT SURE WHAT YOU MEANT BY THAT QUESTION, I KNOW OF NO OTHER WAY

  • yadayada
    yadayada Apr 28, 2010

    I have answered all the questions you asked correctly and quickly, please reward my efforts with a "HELPFUL" rating. thanks

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