FishSniper
NAXJA Forum User
- Location
- Colorado
I've got an intermittent stall-no restart issue. Jeep stalls and usually won't restart right away, but will restart a couple hours to a few hours later. I went at it the old-school method by checking for spark, fuel delivery, air flow, and no luck.
1995 XJ
4.0L
Auto Transmission/4WD
First problem was a stall at highway speed, and no restart; engine cranks but no fire. Towed it home and jumped in it the next day and still no fire. Swapped out the coil and it fired right up. Next day it stalled again, and no restart, but did restart after a couple hours. This goes on for a couple days.
Next plan of attack is to change the crankshaft position sensor. Stall reoccurs, but restarts after a couple hours.
Next effort is new distributor. Distributor was in bad shape when replaced, but stall reoccurs. Tried swapping ASD relay with A/C relay, but no restart, check current flow to #1 plug with timing light-no fire.
I then read about faulty grounds, so I cleaned all of the grounds, checked fuses, cleaned battery connections. Drove it around and it stalled, but would restart, so I'm thinking ignition problem is now gone, but maybe fuel delivery problem.
I check fuel pressure regulator and it tests ok, and I swap fuel filter but stall reoccurs. I swapped out the fuel pump, and test drove it and this time it stalls and no restart-back to dead ignition symptom.
In desperation I recall reading something about the mounting screws for the PCM, so I loosen them and the Jeep runs with no stalls. Not believing that's a real solution, I went to the salvage yard the next day and grabbed a PCM and used fuel pump and ASD relays; I swapped the PCM and relays out and drove it for over an hour with no issues. Kid drove it around during the weekend-no problems.
Kid drives it to school Monday and it stalls again, but restarts. Tuesday the kid drives it to school and it dies before she can get out of the subdivision-no restart.
Pushed it into the garage last night where it now sits. I'm at a loss as to where to look next.
In summary:
New distributor
New Crankshaft Position Sensor
New Coil
New fuel filter
New Fuel Pump
Fuel regulator tests ok
Cleaned Idle Air Control Module
Inspected Throttle Position Sensor
Swapped ASD and Fuel Pump Relays w/salvage relays
Swapped PCM
Cleaned grounds at PDC, battery terminals, and power supply to PDC
Anybody have an idea what else to look for? I've combed through this forum, but haven't really found discussions about problems quite like this.
1995 XJ
4.0L
Auto Transmission/4WD
First problem was a stall at highway speed, and no restart; engine cranks but no fire. Towed it home and jumped in it the next day and still no fire. Swapped out the coil and it fired right up. Next day it stalled again, and no restart, but did restart after a couple hours. This goes on for a couple days.
Next plan of attack is to change the crankshaft position sensor. Stall reoccurs, but restarts after a couple hours.
Next effort is new distributor. Distributor was in bad shape when replaced, but stall reoccurs. Tried swapping ASD relay with A/C relay, but no restart, check current flow to #1 plug with timing light-no fire.
I then read about faulty grounds, so I cleaned all of the grounds, checked fuses, cleaned battery connections. Drove it around and it stalled, but would restart, so I'm thinking ignition problem is now gone, but maybe fuel delivery problem.
I check fuel pressure regulator and it tests ok, and I swap fuel filter but stall reoccurs. I swapped out the fuel pump, and test drove it and this time it stalls and no restart-back to dead ignition symptom.
In desperation I recall reading something about the mounting screws for the PCM, so I loosen them and the Jeep runs with no stalls. Not believing that's a real solution, I went to the salvage yard the next day and grabbed a PCM and used fuel pump and ASD relays; I swapped the PCM and relays out and drove it for over an hour with no issues. Kid drove it around during the weekend-no problems.
Kid drives it to school Monday and it stalls again, but restarts. Tuesday the kid drives it to school and it dies before she can get out of the subdivision-no restart.
Pushed it into the garage last night where it now sits. I'm at a loss as to where to look next.
In summary:
New distributor
New Crankshaft Position Sensor
New Coil
New fuel filter
New Fuel Pump
Fuel regulator tests ok
Cleaned Idle Air Control Module
Inspected Throttle Position Sensor
Swapped ASD and Fuel Pump Relays w/salvage relays
Swapped PCM
Cleaned grounds at PDC, battery terminals, and power supply to PDC
Anybody have an idea what else to look for? I've combed through this forum, but haven't really found discussions about problems quite like this.