My 01 tj with the 4 cyl. has started to miss at about 1900-2100 rpm. It runs great other then that. This jeep had an deep water excursion last year. I replaced the TPS unit, plugs, wires, cap & rotor after that. When I get to around 1900 rpm it misses and if I am cruising at around 2000 it starts missing. I have no engine codes as of right now... Let my know what you think. Is there another senor that could be bad? Like the Map sensor or O2 sensor or something....? Also it always seems to idle lower than my other Jeep is there a throttle ajustment on it? :confused:
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Missing in certain RPM range.
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Originally posted by MrShoeBoy View PostDoes it miss under acceleration or when cruising? Does it happen at WOT? Or does it happen all the time?
AARON
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Originally posted by 94Dodge Truggy View PostIt is not the clutch slipping is it? Could be the coil? Not sure though. Inject it with propane!
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Its been my experiance that when a coil starts to go, it effects higher RPMs first, then hits the lower range. I would look at the MAP sensor. Ran into a similar issue with the motor in my XJ. Ended up replacing the MAP sensor and tweaked the connector and it ran fine.
AARON91 MJ Under construction
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Originally posted by MrShoeBoy View PostIts been my experiance that when a coil starts to go, it effects higher RPMs first, then hits the lower range. I would look at the MAP sensor. Ran into a similar issue with the motor in my XJ. Ended up replacing the MAP sensor and tweaked the connector and it ran fine.
AARON
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It wont always throw a code. Mine didnt and after going through everything else, I replaced it and the problem was fixed. I thought it was my ignition and took out the MDS box and was still there, then went through and put everything back to stock and still didnt fix it. After that I started going through and testing all the sensors and the MAP sensor was still with in spec but right at the bleeding edge of being ok. I replaced it and everything was fine after that. This was on an OBD1 system, the OBD2 might be a little different but the symptoms seem to be the same. Get out FSM and test the sensor and go from there.
AARON91 MJ Under construction
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