Question about 1998 Chevrolet C1500

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Multiple misfire truck idles ok but when giving throttle it starts to break down not stalling just misfireing

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  • HookerHeader Feb 03, 2009

    i have the same problem but at W.O.T it goes fine...im getting a misfire on cylinder 4 ..ive changed the spark plugs wires and T.P.S and im still get the problem...but i havnt changed my O2 sensor and i have a code for it so possible its sending data that its too rich and fouling?!

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Hello;
Have your injectors tested and cleaned. You meay have a bad spray pattern on one or all of them. I have seen as many as six bad injectors on a V8. ALso you should be changing O2 sensors at 100k to keep the engine running top notch.
Hope this helps, please rate me highly.
Thanks;
Rich
RPM Northwest

Posted on Feb 12, 2009

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