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ECM Trouble Codes / What Do They Mean?

Discussion in 'The Garage' started by Fletch79, Aug 6, 2003.

  1. Fletch79

    Fletch79 Registered Member

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    Hey folks,

    I did the paperclip thing, and got the codes off the 'service engine soon' light.

    '87 K5, TBI SB350

    Flashed 12 twice (I believe this says the ECM is A-Okay)
    Flashed 33, 3 times
    Flashed 34, 3 times
    Flashed 44, 3 times
    Flashed 45, 3 times
    Then flashed 12 two more times and repeated the above sequence.

    Can someone please tell me what problems the codes correspond to?
     
  2. fortcollinsram

    fortcollinsram 1/2 ton status

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  3. Fletch79

    Fletch79 Registered Member

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    Thank you, Sir.

    /forums/images/graemlins/thumb.gif
     
  4. sled_dog

    sled_dog 1 ton status

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    ok how in the hell do you trip a lean AND rich condition warning code???
     
  5. Fletch79

    Fletch79 Registered Member

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    Not sure yet, that struck me as weird too.

    This is on the parts truck that I just got.
    TBI unit problems, I think one of the injectors is dead.
    Figured I'd read the codes and do some thinking/tinkering before I start buying parts.
    I just turned up the idle so it'd stay running, and drove it home.

    Once I iron the bugs outta the TBI it's going on my DD.
     
  6. fortcollinsram

    fortcollinsram 1/2 ton status

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    if the Map is jacked up it doesn't know how much fuel to throw in so it is probably going from one extreme to the other...MAP is probably the single most important sensor on a TBI motor...

    Chris
     

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