my '93 yj with 4.0 and manual transmission will not start. i have recently acquired this jeep and before me, it had sat undriven for 3 years . my first thought was to run through the entire ignition system most of the ignition system components were testing within spec but, i still replaced them and will be keeping the "extra" parts in the vehicle for emergencies.
i replaced the timing chain as soon as i got it (284k miles) i was able to confirm that the timing did not jump a tooth. after putting the motor back together, i began chasing down what i perceived
to be an electrical gremlin (radio cutting in and out, windshield wipers, and a/c blower randomly coming on, short in courtesy lighting) after trying to run through the harness under the dash the best that i could, moved to the engine bay. i found some exposed wires on the cam sensor connector - this has been fixed. gave her a go and VROOOM!
fast forward a couple of weeks, i began stripping all of the trim, soft top components as well as the entire cab of the vehicle to get her painted and spray line the pan. the only wires i willingly touched were the speaker wires and dome light.
I hopped in the jeep the following morning to drop it off at the paint booth. she started up, cut out once but kept running and about 30 seconds later, died. now no start. she will crank all day long but will not fire.
so far, here are parts that have been replaced, tested and are known to be good:
- fuel pump
-fuel filter
- fuel regulator
- PCM has not been replaced but check engine light still comes on and i am getting appropriate reference signals at cam sensor, crank sensor, injectors and coil
- distributor and cam sensor
-crank sensor (literally went through 3 of these strait from the parts store- the brand new ones were not testing within spec)
- coil
-plugs (plug wires on the way but highly doubt this is the issue. seem to be testing fine)
- injectors (upgraded to 4 orifice injectors)
- all relays are known to be good
- 02 sensor tested good
- ignition lock cylinder
- i tested the ignition switch and i could have sworn i read a broken circuit for a split second. $20- new one is on the way
- new turn signal switch (left turn signal was broken)
- replaced the oil pump with a high output (oil pressure was getting dangerously low when motor was warmed up at idle)
- all grounds have been replaced with new connectors
seems to be an electrical issue. maybe some lose connection in the dash? i have recently found out that the inside of the windshield frame is toast- rusted plum out. so a new windshield frame is on the way. any ideas of common wiring issues within the dash would be appreciated. i believe the windshield has to be removed to open the entire dash, so if i need to do so while i have it removed, now is the time.
i replaced the timing chain as soon as i got it (284k miles) i was able to confirm that the timing did not jump a tooth. after putting the motor back together, i began chasing down what i perceived
fast forward a couple of weeks, i began stripping all of the trim, soft top components as well as the entire cab of the vehicle to get her painted and spray line the pan. the only wires i willingly touched were the speaker wires and dome light.
I hopped in the jeep the following morning to drop it off at the paint booth. she started up, cut out once but kept running and about 30 seconds later, died. now no start. she will crank all day long but will not fire.
so far, here are parts that have been replaced, tested and are known to be good:
- fuel pump
-fuel filter
- fuel regulator
- PCM has not been replaced but check engine light still comes on and i am getting appropriate reference signals at cam sensor, crank sensor, injectors and coil
- distributor and cam sensor
-crank sensor (literally went through 3 of these strait from the parts store- the brand new ones were not testing within spec)
- coil
-plugs (plug wires on the way but highly doubt this is the issue. seem to be testing fine)
- injectors (upgraded to 4 orifice injectors)
- all relays are known to be good
- 02 sensor tested good
- ignition lock cylinder
- i tested the ignition switch and i could have sworn i read a broken circuit for a split second. $20- new one is on the way
- new turn signal switch (left turn signal was broken)
- replaced the oil pump with a high output (oil pressure was getting dangerously low when motor was warmed up at idle)
- all grounds have been replaced with new connectors
seems to be an electrical issue. maybe some lose connection in the dash? i have recently found out that the inside of the windshield frame is toast- rusted plum out. so a new windshield frame is on the way. any ideas of common wiring issues within the dash would be appreciated. i believe the windshield has to be removed to open the entire dash, so if i need to do so while i have it removed, now is the time.