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ENGINE RUNNING RICH

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by KILLERK5, Oct 26, 2000.

  1. KILLERK5

    KILLERK5 1/2 ton status

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    Location:
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    MY "SERVICE ENGINE LIGHT" KEEPS LIGHTING UP WHEN IM ON THE THROTTLE FOR TOO LONG. THE CODE IS A 44, WHICH IS THE O2 SENSOR IS INDICATING LEAN EXHAUST. I REPLACED THE O2 SENSOR, BECAUSE I RAN A VOLTAGE TEST ON IT AND IT FAILED. DOES ANYBODY HAVE ANY SUGGESTIONS ON WHAT ELSE TO CHECK?
     
  2. rich'90

    rich'90 1/2 ton status

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    Try the MAP sensor.

    Go heavy or Go home[​IMG]
     
  3. captaink5

    captaink5 Newbie

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    you need to hook up a vacuum gauge to the manifold and see what kind of vacuum you have. the cam shaft may be bad. I had the same symptoms in my 90K5, and that was what I found. good luck the captain.
     
  4. captaink5

    captaink5 Newbie

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    you need to hook up a vacuum gauge to the manifold and see what kind of vacuum you have. the cam shaft may be bad. I had the same symptoms in my 90K5, and that was what I found. good luck the captain.
     

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