Cant shake the misfire blues-Help
#1
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Year: 1997
Model: Cherokee
Engine: 4.0 Liter
Cant shake the misfire blues-Help
I have a 97 4.0 Jeep Cherokee. Since I bought it I have replaced the cap, rotor, wires and plugs. It runs great but I keep getting check engine light for randon cylinder misfires. I have Seafoamed it and swapped the injectors for 307s. Same issue. Any other ideas?
Thanks,
Flash
Thanks,
Flash
#6
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Year: 1999
Model: Cherokee
Engine: 4.0
Random misfire code is often caused by one "common" root cause.
The first thing I would do (and what a shop would do) is to verify proper fuel pressure. This must be done with a gauge; anything less is guesswork.
For a 97, you should have 49 psi, plus or minus 5 psi.
A major vacuum leak is also a primary suspect with a random misfire.
Start there.
The first thing I would do (and what a shop would do) is to verify proper fuel pressure. This must be done with a gauge; anything less is guesswork.
For a 97, you should have 49 psi, plus or minus 5 psi.
A major vacuum leak is also a primary suspect with a random misfire.
Start there.
#7
Can be a knick in an electrical wire in the wire box, this happened to me it was sending wrong pulses to the fuel injector.
Look at my post concerning my issue I just replayed on it today
Look at my post concerning my issue I just replayed on it today
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