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bad ecm

jamesrulz

By jamesrulz
in Joyner UTV SxS Forum

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jamesrulz Contributor

jamesrulz

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Has anyone had bad ecm. I think I do because my fan runs all the time and it leans out and doesn't respond to O2 signal quickly. I replaced the O2 not the issue I have a afr gauge on it and it goes lean but the computer doesn't respond. I can drive part throttle and the engine dies and comes back back and forth fuel pressure and ignition are good. Anyone have a issue like this or have any input?

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Paiute3 Proficient

Paiute3

Posted
Posted

Trace all your wiring from O2 switch all the way back to the ECM. Look for rubs that could cause shorts in your 02 harness.

We had a similar problem with our T4 and the wire was rubbing on the starter and all of our wires had melted together in the 4 wire harness.

Also the dealer let us pull our ECM and he put it in a new trooper just to make sure it was not a ECM problem. Good Luck.

George

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