running rich?
#1
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Location: vestal new york
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Year: 2000
Model: Cherokee
Engine: 4.0
running rich?
i just bought a 2000 cherokee with 4.0. it seems to be running rich, and if left sitting for a few days i get a puff of smoke at start up. any ideas? im thinking valve seals. if changing them a big problem?
#2
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Location: Easthampton, MA
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Year: 1999
Model: Cherokee
Engine: 4.0
Smoke color?
Black- unburned fuel
Blue-oil
White- antifreeze or just water burn off from fuel
Running rich would be black smoke and O2 sensors were making mine run rich.
Black- unburned fuel
Blue-oil
White- antifreeze or just water burn off from fuel
Running rich would be black smoke and O2 sensors were making mine run rich.
#5
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Location: Charleston, SC
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Year: 1990 - 2000
Model: Cherokee
Engine: 4.0
O2 sensor of air filter
Check Engine Light
Rich = black smoke, dark spark plugs, and poor gas mileage
Reason: O2 sensor bad, dirty air filter....
Puff of white smoke after sitting a few days is most likely valve seals. There is a bit of work involved. It can be done with the engine in the car and the head on.
Rich = black smoke, dark spark plugs, and poor gas mileage
Reason: O2 sensor bad, dirty air filter....
Puff of white smoke after sitting a few days is most likely valve seals. There is a bit of work involved. It can be done with the engine in the car and the head on.
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