Longtime; first time.
2006 TJU w/4.0l, auto. Never had a hiccup. Backing out of garage it stalled w/o warning and wouldn't re-start. Battery is strong, motor cranks over as usual but does not even try to start/run. I've checked the obvious wire connections and even replaced - one by one - the CKS, CMS and MAP sensor already. (All from stealer - Ouch!). Still no start. It has the coil rail but I can't find any info on checking spark/coil function for this setup. (I doubt, however, it is an individual coil or plug problem because was running fine and suddenly died. Never ran crappy. I think it would also be unlikely for enough coils/plugs to fail at the same time to cause no-start.) I checked all of the wires for wear and burn but no obvious indications. I also tried wiggling and flexing the wires and junctions. No go. Any ideas how to test coil rail? (I have is a digi-meter.)
There is no Schrader on the fuel rail so I haven't been able to test fuel pressure but I can hear the pump charge when the key is first turned on and priming the throttle body with some fresh gas made no difference. This makes me think the problem is electrical and not fuel-related.)
No codes were posted until after a dozen or so attempts to start it. Then p0522 started showing up and after several more attempts to start, p0123.
Are there other sensors/switches critical to ignition that should be ruled out before having it towed? (I hate seeing CJs/YJs on the hook, especially mine. Makes me sad.)
A bit aggravated. Any thoughts are much appreciated.
Thanks for listening.