My 4.0 started running very rich and surging
06-26-2011, 05:32 PM
#1
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Year: 1996
Model: Cherokee
Engine: 4L HO
My 4.0 started running very rich and surging
I took my Cherokee off roading today and first let me say, holy cow, this thing will go where a goat would turn around and go back! I was in some particularly bad rocks and holes and suddenly it starts to idle bad, surge and run like crap, fortunately I made it home. Black smoke is coming out of the tail pipe, it's obviously running rich, any ideas?
06-26-2011, 07:03 PM
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Year: 1996
Model: Cherokee
Engine: 4L HO
Yes, but it's been on a long time as O2 sensor wire is disconnected. It has always run fine though and gotten decent mileage. I have the Ford V8 injectors btw. It happened all of a sudden.
06-26-2011, 07:04 PM
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Model: Cherokee
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