I posted this on a Wrangler forum, but thought there might be a local Jeep guy that might have an idea...
I have an '02 Jeep Wrangler , 6 cylinder/4.0/five speed, with about 197,000
miles on it. For the past 20 or 30 thousand miles I've had an occasional misfire
and flashing check engine light (codes P0300, P0301) during periods of slowing
down with the engine engaged. If I pushed the clutch in a let the engine idle
while slowing down, the problem would not appear...
It was more of an annoyance than a big problem as it would occur for a couple of days, then go
away for weeks or months at a time. Recently, it's doing it all the time now, so I can't put it off any longer...
Things I've done include dropping the fuel tank and replacing the fuel sender unit (this fixed my fuel gauge indicator
occasionally going dead problem), replacing the crank position sensor, replaced the plugs and plug wires.
Any thoughts? I've found many threads talking about misfires and flashing CEL occurring at highway speeds around 60 miles per
hour or so and that slowing down the problem would go away. My problem seems to be exact opposite. Jeep runs fine at highway speeds, but acts up when I slow down with the engine in gear. As a matter of fact, if I press the gas and accelerate, the engine stops misfiring and the CEL stops flashing.
I have an '02 Jeep Wrangler , 6 cylinder/4.0/five speed, with about 197,000
miles on it. For the past 20 or 30 thousand miles I've had an occasional misfire
and flashing check engine light (codes P0300, P0301) during periods of slowing
down with the engine engaged. If I pushed the clutch in a let the engine idle
while slowing down, the problem would not appear...
It was more of an annoyance than a big problem as it would occur for a couple of days, then go
away for weeks or months at a time. Recently, it's doing it all the time now, so I can't put it off any longer...
Things I've done include dropping the fuel tank and replacing the fuel sender unit (this fixed my fuel gauge indicator
occasionally going dead problem), replacing the crank position sensor, replaced the plugs and plug wires.
Any thoughts? I've found many threads talking about misfires and flashing CEL occurring at highway speeds around 60 miles per
hour or so and that slowing down the problem would go away. My problem seems to be exact opposite. Jeep runs fine at highway speeds, but acts up when I slow down with the engine in gear. As a matter of fact, if I press the gas and accelerate, the engine stops misfiring and the CEL stops flashing.
