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PERSISTANT CODE 43

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by RESTORE89, Mar 10, 2001.

  1. RESTORE89

    RESTORE89 1/2 ton status

    Joined:
    Jan 31, 2001
    Posts:
    548
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    Location:
    CHAS SC
    STILL HAVING A PROBLEM WITH A CODE 43 KNOCK SENSOR, AND I HAVE TRIED REPLACING THE ESC AND THE KNOCK SENSOR. I REPLACED THE GEARS TO GET BACK TO FACTORY SPECS ON THE ENGINE, WITH 33-12.50 TIRES, THINKING MAYBE THE THROTTLE POSITION SENSOR WAS MESSING UP THE SENSOR, BUT IT STILL SHOWS UP, BUT IT IS INTERMITTANT IN NATURE. ANY ADVICE ON HOW TO CORRECT THIS VERY ANNOYING PROBLEM? WHEN THE LIGHT COMES ON, THE TRUCK RUNS REAL ROUGH AT LOW RPM.
    THANKS
    CHRIS
     
  2. jpdrake

    jpdrake 1/2 ton status

    Joined:
    Oct 31, 2005
    Posts:
    381
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    0
    Location:
    mass/ cape cod
    im having the same code, problem "rough at low rpm" any advice?
     

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