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Need help With an Issue

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Krase, May 19, 2002.

  1. Krase

    Krase Registered Member

    Joined:
    May 19, 2002
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    Location:
    Northeast ,Tennessee
    I got a problem with a service engine soon light coming on when i get on the highway with my 88 k5. It will not do it around town or at low speeds, only when i get up to around 70 or so. THe oil pressure and temperature are fine, and there is no noticable problems, but i am befuddled and wandered if any of you might have an answer.
     
  2. Batchman

    Batchman Registered Member

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    Location:
    Oklahoma
    I had the same problem my was the O2 sensor making the vehicle run to lean at highway speeds ie 75mph and up?
     
  3. Pookster

    Pookster 1/2 ton status

    Joined:
    Nov 21, 2000
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    Location:
    NYC, NY, USA
    YEah, I get the same issue. dunno what the problem is, but I believe its my O2 as well Mine is only at highway if i maintain EXACTLY the same speed for 5 minutes. /forums/images/icons/smile.gif
     

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