HELP!!! My 1993 ZJ, 4.0 stalled while driving home last week. Engine turns great, just no spark. Fuel pump works when turning key on. Here's what I've done so far....
new fuel pump
new crankshaft position sensor (actually this is the second one. First one was 3 months old because jeep would intermittently stall and replacing it solved the problem)
checked camshaft position sensor, it was good
cleaned out throttle position sensor
removed and checked ignition coil*
new rotor
new distributor cap
changed spark plugs
took negative battery terminal off for 30 minutes to "reset computer"
tried turning the key 3 times in each door and rear hatch to "reset" the security system (waste of time or maybe I should have done this while standing on my head and reciting the alphabet)
*The ignition coil has low spark going to it when turning the key. Secondary is fine.
The other thing is I noticed the anti-theft check light is illuminated on dash in blue. I think this lit up a couple weeks ago. I never had the key fob to use keyless entry. Nor do the auto door locks work. The keys I have are non-chipped keys. So I manually lock and unlock the doors and rear hatch.
I am at a loss here. Could the security system be sending the signal to not let the engine start? Please help!

 

[QUOTE=BloNdeChiNeEz;3610433]HELP!!! My 1993 ZJ, 4.0 stalled while driving home last week. Engine turns great, just no spark. Fuel pump works when turning key on. Here's what I've done so far....
new fuel pump
new crankshaft position sensor (actually this is the second one. First one was 3 months old because jeep would intermittently stall and replacing it solved the problem)
checked camshaft position sensor, it was good
cleaned out throttle position sensor
removed and checked ignition coil*
new rotor
new distributor cap
changed spark plugs
took negative battery terminal off for 30 minutes to "reset computer"
tried turning the key 3 times in each door and rear hatch to "reset" the security system (waste of time or maybe I should have done this while standing on my head and reciting the alphabet)
*The ignition coil has low spark going to it when turning the key. Secondary is fine.
The other thing is I noticed the anti-theft check light is illuminated on dash in blue. I think this lit up a couple weeks ago. I never had the key fob to use keyless entry. Nor do the auto door locks work. The keys I have are non-chipped keys. So I manually lock and unlock the doors and rear hatch.
I am at a loss here. Could the security system be sending the signal to not let the engine start? Please help!
*Update *It was my ignition coil. Just replaced it and she starts up! Now #5 spark plug is bad. Gonna have to go to town tomorrow and buy a new one. If it isn't one thing, its another. At least that's an easy fix.