First time poster with Naxja! Thanks for reading folks. I've searched and searched. But can't seem to find an answer. Sorry for the long post.
I have this same issue on a 2000 Cherokee sport 4.0L. It cranks (engine spins) but it won't actually start.
Got the "no bus" error on the dash the first time we tried to start it and found that there was a heavy ground right behind the alternator that wasn't connected. We disco'd the ground on the battery, reconnected the ground to one of the two studs right behind the alt on the block and reconnected the battery. It then started cranking just fine, but no spark.
Just put a new long block in after the old one chewed up a piston. Everything worked fine before the engine went. Now it just refuses to start. Battery was dead as a door nail, so got a fresh one and put that in. Read about a possible security disable feature where you have to unlock the drivers door with the physical key this morning... havent had a chance to try it yet. I have fuel pressure, but no spark. Here's what I've done:
* I've swapped the ASD relay
* Checked for fuel pressure, the fender got sprayed so I think I'm ok there
* I've swapped cam position sensor out
* I unlocked the car using the remote entry fob
* Checked the crank sensor (ohm test between 1k-10k) checks fine
* Checked the internals on the PCM, looks fine connections are AOK
* Checked fuses, found 1 10A fuse dead (4th from the top on the right) and replaced it
* Pulled the coil pack off the engine and checked for spark and its got nothing
I just put a new long block in after the old one chewed up a piston. Everything worked fine before the engine went. Now it just refuses to start. Battery was dead as a door nail, so got a fresh one and put that in. Read a lot about a possible security disable feature where you have to unlock the drivers door with the physical key this morning... havent had a chance to try it yet.
I don't think the truck has the chip in the key... this key was working fine before the engine went...
Any other ideas?
I have this same issue on a 2000 Cherokee sport 4.0L. It cranks (engine spins) but it won't actually start.
Got the "no bus" error on the dash the first time we tried to start it and found that there was a heavy ground right behind the alternator that wasn't connected. We disco'd the ground on the battery, reconnected the ground to one of the two studs right behind the alt on the block and reconnected the battery. It then started cranking just fine, but no spark.
Just put a new long block in after the old one chewed up a piston. Everything worked fine before the engine went. Now it just refuses to start. Battery was dead as a door nail, so got a fresh one and put that in. Read about a possible security disable feature where you have to unlock the drivers door with the physical key this morning... havent had a chance to try it yet. I have fuel pressure, but no spark. Here's what I've done:
* I've swapped the ASD relay
* Checked for fuel pressure, the fender got sprayed so I think I'm ok there
* I've swapped cam position sensor out
* I unlocked the car using the remote entry fob
* Checked the crank sensor (ohm test between 1k-10k) checks fine
* Checked the internals on the PCM, looks fine connections are AOK
* Checked fuses, found 1 10A fuse dead (4th from the top on the right) and replaced it
* Pulled the coil pack off the engine and checked for spark and its got nothing
I just put a new long block in after the old one chewed up a piston. Everything worked fine before the engine went. Now it just refuses to start. Battery was dead as a door nail, so got a fresh one and put that in. Read a lot about a possible security disable feature where you have to unlock the drivers door with the physical key this morning... havent had a chance to try it yet.
I don't think the truck has the chip in the key... this key was working fine before the engine went...
Any other ideas?