Rhys898
NAXJA Forum User
- Location
- Santa Clarita, Ca
Hello Everyone,
I have a 1990 Jeep Cherokee Laredo 4x4 with the 4.0L motor and NP242 transfer case and 4 speed automatic transmission. Every six months to a year for the last 3-4 years I have had to play musical coils to get the car to run. I have 4 total now that all test the same or very close to the same with a multimeter but sometimes they would work, sometimes not.
About a month ago the Jeep stopped running all together, thankfully I was at home when it failed to start and I was able to borrow a car from my dad.
The first thing we replaced was the 5-6 year old Crankshaft Position Sensor with a new Standard(brand) one since the musical coils didn't work. When that did not solve the problem we replaced the coil again with a brand new Bosch. Still didn't work. Got an Intermotor Ignition Control Module. Car started fine in the driveway, ran to go to the store and back, ran to a friends house. After being parked for an hour we headed back home and got about half way when the engine died at 35mph on a down hill. Came to a stop at a busy stop sign but was unable to get it started again.
Got the car towed back to the house the next day and after futsing with it for an hour or so my room mate got it running again. Turned it off, left it for 15 minutes, started right up again. Next day went to use it, wont start again.
Battery and alternator are good, we have fuel pressure at the rail, but are not getting a spark.
My mechanic room mate and I are at our whits end.
Any Help GREATLY appreciated.
Jeremy
I have a 1990 Jeep Cherokee Laredo 4x4 with the 4.0L motor and NP242 transfer case and 4 speed automatic transmission. Every six months to a year for the last 3-4 years I have had to play musical coils to get the car to run. I have 4 total now that all test the same or very close to the same with a multimeter but sometimes they would work, sometimes not.
About a month ago the Jeep stopped running all together, thankfully I was at home when it failed to start and I was able to borrow a car from my dad.
The first thing we replaced was the 5-6 year old Crankshaft Position Sensor with a new Standard(brand) one since the musical coils didn't work. When that did not solve the problem we replaced the coil again with a brand new Bosch. Still didn't work. Got an Intermotor Ignition Control Module. Car started fine in the driveway, ran to go to the store and back, ran to a friends house. After being parked for an hour we headed back home and got about half way when the engine died at 35mph on a down hill. Came to a stop at a busy stop sign but was unable to get it started again.
Got the car towed back to the house the next day and after futsing with it for an hour or so my room mate got it running again. Turned it off, left it for 15 minutes, started right up again. Next day went to use it, wont start again.
Battery and alternator are good, we have fuel pressure at the rail, but are not getting a spark.
My mechanic room mate and I are at our whits end.
Any Help GREATLY appreciated.
Jeremy