I am at a loss as is my mechanic
Golen Stoker 4.6 with about 8,000 miles.
Had a bad exhaust gasket and was misfiring on 2 and 5. that was fixed and jeep ran fine for 6 months
Then I had a broken value spring on Cyl 5 - Repaired that
Next at about 3,000 rpm the jeep would throw misfire on Cyl 5 and go into Limp Mode. Turn key off then on and jeep would run fine
Mechanic has had it about 2 months and we are all running out of suggestions.
1: Fuel Injectors returned to manufacturer for cleaning and inline filters
2: Cam Position sensor swapped from a jeep that was running fine - other jeep runs fine with my CPS
3: Crank Sensor swapped from a jeep that was running fine - other jeep runs fine with my CKS
4: Ignition Coil replaced with 2 different ones
5: Plugs replaced
6: All wiring inspected and tested by Jeep mechanic
7: Ignition Timing set (off by 1 degree)
8: Fuel Timing checked
9: Fuel Pressure tested OK
10 PCM sent for testing and repair. Shop claimed some capacitors were bad but said the 3 coil firing systems were fine. Charged about 350 to fix "Something" but problem remains. Claims PCM tests fine and issue is wiring downstream
Odd thing - When this started it would throw a code for Cyl 5 misfire then go into limp mode. This is the same Cyl that had the broken value spring.
After the PCM rebuild it now throws the P1391 (Intermittent Cam and Crank Sensor connectivity)
Thinking next I will purchase another PCM to rule out the repair performed on original PCM
Currently Jeep starts fine but if you drive a mile or so it throws the P1391 then goes into limp mode.
Any other suggestions would be appreciated
Golen Stoker 4.6 with about 8,000 miles.
Had a bad exhaust gasket and was misfiring on 2 and 5. that was fixed and jeep ran fine for 6 months
Then I had a broken value spring on Cyl 5 - Repaired that
Next at about 3,000 rpm the jeep would throw misfire on Cyl 5 and go into Limp Mode. Turn key off then on and jeep would run fine
Mechanic has had it about 2 months and we are all running out of suggestions.
1: Fuel Injectors returned to manufacturer for cleaning and inline filters
2: Cam Position sensor swapped from a jeep that was running fine - other jeep runs fine with my CPS
3: Crank Sensor swapped from a jeep that was running fine - other jeep runs fine with my CKS
4: Ignition Coil replaced with 2 different ones
5: Plugs replaced
6: All wiring inspected and tested by Jeep mechanic
7: Ignition Timing set (off by 1 degree)
8: Fuel Timing checked
9: Fuel Pressure tested OK
10 PCM sent for testing and repair. Shop claimed some capacitors were bad but said the 3 coil firing systems were fine. Charged about 350 to fix "Something" but problem remains. Claims PCM tests fine and issue is wiring downstream
Odd thing - When this started it would throw a code for Cyl 5 misfire then go into limp mode. This is the same Cyl that had the broken value spring.
After the PCM rebuild it now throws the P1391 (Intermittent Cam and Crank Sensor connectivity)
Thinking next I will purchase another PCM to rule out the repair performed on original PCM
Currently Jeep starts fine but if you drive a mile or so it throws the P1391 then goes into limp mode.
Any other suggestions would be appreciated
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