Question about Chevrolet Silverado 1500

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1992 chevrolet k1500 350 tbi 5 speed has a skip all the time has new plugs ,wires,dist,egr,tps,iac,coil,icm on codes stored in computer how can you tell if the injectors are bad

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  • Jimmy Jarrett
    Jimmy Jarrett Oct 14, 2010

    with the truck running and the breather off the spray from the injectors down in the throttle body goes around and around but there is a little drip in the middle of each one at the same time is this normal or could they be bad thanks jimmy

  • Jimmy Jarrett
    Jimmy Jarrett Dec 18, 2010

    put i new injectors and fuel pressure regulator kit did not help



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  • Chevrolet Master
  • 6,826 Answers

OK, get a stethoscope to listen for the telltale clicking of the injector when it is connected to the listening tool.

Also, one can buy a noid light that connects to the harness to see if it is lighting or pulsing electricity to the injector when running or cranking.

A bad or plugged up fuel injector can cause the skip or miss in the engine.

Also, a bad or burnt 'valve' can cause this symptom.

Do a compression test to see that all of the cylinders have the same compression characteristics.

That's all I can think of right now.

Posted on Oct 14, 2010

  • Duane Wong
    Duane Wong Oct 14, 2010

    A bad injector will leak at the throttle body when the engine is turned off and you'll see it drip.

    Good luck on this repair.

  • Duane Wong
    Duane Wong Dec 19, 2010

    Then, with all of the things changed on your engine, I think that there may be mechanical wear on the rings or valves that is throwing things off. Check for even compression on all of the cylinders.



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