Hey Bill try this if you think it's your security system causing the problem. Or maybe you already have but anyways lock all the doors then use the door key not the key fob if you have one. But anyways put your key in the drivers side door lock and manually unlock the door. Most modern vehicles this will reset and disarm the security system. But I would really have the fuel system check
SOURCE: 94 LuminaAPV wont start --Sometimes
When you replaced the ECM, did you use a nice coating of di-electric grease? That helps distribute the heat from the ecm so it doesn't over heat. Also check your ignition wiring going from the battery to the ignition switch. Check for any loose or broken connections. A local shop can help you find wire shorts BUT BE ADVISED, Most shops charge a $70 an hour fee to diagnose electric problems. Thats not to fix, only find problems. I highly recommend a self search first.
Testimonial: "Thought had it cured..didn't. Cant find a thing that would prevent firing intermittently, then reset...any ideas ??"
Car
not starting or turning over indicates towards multiple possibilities. It can
be issue with battery or weak battery. But if battery checks out ok, then it
can be starter issue or faulty alternator or problem with low fuel pressure or
no spark at spark plugs due to dirty spark plugs or faulty ignition
coil or injectors getting cracked or dirty and needs to be cleaned.
To
confirm the problem, the basic troubleshooting is required.
Click
this link below and follow the troubleshooting:------
http://technoanswers.blogspot.in/2012/02/car-starting-issues.html
---------
This will help.
Thanks.
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