Jeep XJ unstable idle and black smoke
My Jeep XJ 2.5 93 model, the problem is:
idle is not constant and the RPM reading is up and down and also black smoke and I can smell fuel. When I press the gas pedal, it sputters.Is it my IAC problem? |
I would clean the IAC and throttle body. I would also check the map sensor and the vacuum hose that is attached to it, the vacuum hose is plastic and tends to brake over time. Is the CEL on?
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Originally Posted by dans98xj
(Post 3402289)
I would clean the IAC and throttle body. I would also check the map sensor and the vacuum hose that is attached to it, the vacuum hose is plastic and tends to brake over time. Is the CEL on?
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Sounds like its running rich for some reason, either too much fuel or too little air...could be so many things.
I'd personally start with simply resetting your PCM and refreshing all your grounds first, that stuff can cause havoc. Check your TPS and especially o2 sensors, but if you don't have a check engine light its most likely not those. Fuel regulator or injectors would be my last port of call...good luck |
Inspect the hose very closely that runs from the intake manifold to the MAP sensor.
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Originally Posted by RudeXJ
(Post 3402300)
Sounds like its running rich for some reason, either too much fuel or too little air...could be so many things.
I'd personally start with simply resetting your PCM and refreshing all your grounds first, that stuff can cause havoc. Check your TPS and especially o2 sensors, but if you don't have a check engine light its most likely not those. Fuel regulator or injectors would be my last port of call...good luck |
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