Jeep xj black smoke
06-23-2017, 08:33 AM
#1
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Model: Cherokee
Jeep xj black smoke
My jeep Xj 2.5 manual 93 model having black smoke from exhaust and after few minutes drive need to press the gas pedal to start the engine.Is it my injector problem or injector leak problem?
06-23-2017, 09:44 AM
#2
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Year: 1998
Model: Cherokee
Engine: 4.0
Sounds like your injectors are leaking wile the engine is off. It also sounds like your injectors are stuck open when running. I would change them out for a nice set of new injectors.
06-23-2017, 09:49 AM
#3
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Do you think my O2 sensor bad? or just my injectors. Because I can smell the fuel at the exhaust. If I press the gas pedal, the engine is misfiring. Hesitate to rev.
06-23-2017, 09:54 AM
#4
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Year: 1998
Model: Cherokee
Engine: 4.0
If the O2 sensor has not been changed then you should change that too. It could cause the black smoke wile running too rich, but having to step on the gas to start is a clue to a leaking injector after the engine is off. It is a way to start if the system if it flooded with gas. Any CEL on?
06-23-2017, 11:18 AM
#5
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Model: Cherokee
If the O2 sensor has not been changed then you should change that too. It could cause the black smoke wile running too rich, but having to step on the gas to start is a clue to a leaking injector after the engine is off. It is a way to start if the system if it flooded with gas. Any CEL on?
06-24-2017, 08:53 AM
#6
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Hows the hose from the intake manifold to MAP sensor?
