possible misfire
#1
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Location: illinois
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Year: 1999
Model: Cherokee
Engine: 4.0
possible misfire
so i have a 99 4.0. i have what feels like a misfire only at idle. i can see the rpm needle move just slightly bot not all the time. i can feel it all the time though but again only at idle. ive replaced the spark plugs with champions, wires, cap and rotor. am i looking at a bad injector possibly? also the check engine light is not on and hasnt gone on at all.........yes the bulb does work
#2
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Unplug spark plug wires from the distributor while it's running one at a time.
If you pull a plug wire and the engine continues running just like it is now then you've found the cylinder with the problem.
If it runs rougher when you pull the wire then it was working fine.
Careful, don't let it bite you.
If you pull a plug wire and the engine continues running just like it is now then you've found the cylinder with the problem.
If it runs rougher when you pull the wire then it was working fine.
Careful, don't let it bite you.
#4
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Year: 1999
Model: Cherokee
Engine: 4.0
The Jeep has 113k on the clock. Why wouldn't it throw a check engine light? And why would it only happen at idle? Could it be that a fuel injector is leaking our partially clogged? Maybe it's time for some 784s
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