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Bad Injector???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 89K5, Dec 6, 2000.

  1. 89K5

    89K5 1/2 ton status

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    OK I've been try to find the fix for my engine surge (I know, its taking me awhile, I'm new at this). At first, it surged only when the outside temp and the engine were cold (approx. <30 degrees). Last couple of days it does it even when engine is warm. Outside temp has been in the twenties. I finally watched the gas go in and noticed that the left injector has a constant stream of gas and the right side surges, even when giving it throttle. Is it a bad injector, or possibly something else? Is an injector change a hard fix?
     
  2. 89K5

    89K5 1/2 ton status

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    Just putting on top to see if anyone can give me any more info.
     
  3. realsquash

    realsquash 1/2 ton status

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    Tap the sides of the injector pods with the HANDLE of a wooden handle hammer while it's running. Try rapping on them at 2000 RPM and watch the streams. How many miles are on the engine?

    Squash
    http://www.trailrunners4x4.org/users/realsquash
     
  4. 89K5

    89K5 1/2 ton status

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    Thanks, I'll try that.
    I remeber last year when cleaning the TBI I pinched the injector wires and it ran rough. So I'm going to see if there is a problem with the wires too.
     
  5. realsquash

    realsquash 1/2 ton status

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    Heck yeah, it could be the injector wires! Shorting one of the wires out will run the injector to "static", where it doesn't close at all. Shorting the other wire would eventually blow the ECM fuse.

    Squash
    http://www.trailrunners4x4.org/users/realsquash
     
  6. 89K5

    89K5 1/2 ton status

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    Banged on the injectors, no change. Switched wires between the two, the right side continued to spurt intermitently. Changed it, problem gone. Thanks
     
  7. Hobbes68

    Hobbes68 Registered Member

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    Just curious, how much did the injector cost?
     
  8. 89K5

    89K5 1/2 ton status

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    $113.00 from GM.
     

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