How to stop running too rich
07-18-2011, 12:52 AM
#1
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Year: 1989
Model: Cherokee
Engine: Inline 6, 4.0L
How to stop running too rich
My jeep is putting out black smoke, so its running too rich? What do I do to fix it?
07-18-2011, 01:38 AM
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Year: 1994
Model: Cherokee
Engine: 4.0 L/242 CID I-6 High Output MFI
MAP sensor is easily cleaned woth TB cleaner. Takes five minutes lol, just be careful, it's plastic on the end you don't see.
07-18-2011, 01:39 AM
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Year: 1989
Model: Cherokee
Engine: 4.0
Originally Posted by 94JeepCherokeeMan
MAP sensor is easily cleaned woth TB cleaner. Takes five minutes lol, just be careful, it's plastic on the end you don't see.
pieced together on my iPhone using my uber l337 hax skilz.
07-18-2011, 01:47 AM
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Year: 1994
Model: Cherokee
Engine: 4.0 L/242 CID I-6 High Output MFI
Yours might be a bit different. Pretty sure my MAP sensor is the one with the electrical hookup. RENIX is probably different.
07-18-2011, 01:52 AM
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Year: 1989
Model: Cherokee
Engine: 4.0
The map sensor on all Cherokees are up on the firewall with a vacuum line going to it. It's not cleanable. All you can do is check the line going to it for a leak and do an ohms test on it. In most cases if it's blowing black smoke smoke the map is the problem or the fuel pressure regulator is stuck closed.
pieced together on my iPhone using my uber l337 hax skilz.
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07-18-2011, 01:53 AM
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Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Originally Posted by odgreen89on35s
The map sensor on all Cherokees are up on the firewall with a vacuum line going to it. It's not cleanable. All you can do is check the line going to it for a leak and do an ohms test on it. In most cases if it's blowing black smoke smoke the map is the problem or the fuel pressure regulator is stuck closed.
pieced together on my iPhone using my uber l337 hax skilz.
pieced together on my iPhone using my uber l337 hax skilz.
07-18-2011, 02:01 AM
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Year: 1994
Model: Cherokee
Engine: 4.0 L/242 CID I-6 High Output MFI
Well, then wth is the sensor in the intake manifold, driver's side, with the electrical connection? I took it out, it's got a plastic cage surrounding an old-style blue capacitor-looking electronic component
07-18-2011, 02:41 AM
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Year: 1990
Model: Cherokee
Engine: The venerable 4.0
If it is then that sensor riches or leans the mix depending on the air temp it reads. A lot of people relocate it to the air box which ie good.in he summer but drops some mileage in the winter. So in actual fact that does mess with the mixture.and if that little sucker malfunctions.it could.cause.rich running.