It's not boat related but I have a 02 Tahoe with a 5.3 vortec and it has a misfire in cylinder 3. I changed the plugs wires and coil. Checked compression and all cylinders are around 160. Anyone have any suggestions on what could be going on? I tried to google it and all I can find is Info for random misfires.


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Is the check engine light on?  Probably needs a crank sensor

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Ya it's only #3. I'm gonna swap the injector with #1 and see if it changes the misfire to #1


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Do you have a noid light? To test the circuit going to the injector... they only cost about $12....

Betting on a tired/plugged injector.

GT

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Thanks for the advice. I switched injectors and the misfire followed the injector to cylinder one. So I'm on my way to autozone to pick one up. There not cheap for a flex fuel lol.


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Lol i was right. First time for everything

big river chris

lol you were. I just changed it and no more misfire and no more service engine soon light.


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