Information:
80 CJ7 with 83 4.2, Webber carburetor, Motorcraft ignition with the square coil and the flat box control module on the passenger fender.
Painless harness.
Background:
Went to breakfast the other morning and had a hard time starting when we left.
Got it home and parked it but left a switch on and drained the battery.
Tried to jump it last night after letting it charge a bit, needed to use it to drag my trailer.
That is when the really weird problem started.
Problem:
Hit the key, engine cranks, and fires but as soon as you let off the key it shuts off.
It is like the key is being turned off because it loses all ignition to the point if you are trying to rev it will backfire.
Ignition switch?
Wiring problem?
All gauges work in the run position.
80 CJ7 with 83 4.2, Webber carburetor, Motorcraft ignition with the square coil and the flat box control module on the passenger fender.
Painless harness.
Background:
Went to breakfast the other morning and had a hard time starting when we left.
Got it home and parked it but left a switch on and drained the battery.
Tried to jump it last night after letting it charge a bit, needed to use it to drag my trailer.
That is when the really weird problem started.
Problem:
Hit the key, engine cranks, and fires but as soon as you let off the key it shuts off.
It is like the key is being turned off because it loses all ignition to the point if you are trying to rev it will backfire.
Ignition switch?
Wiring problem?
All gauges work in the run position.
Feb 12, 2018 at 7:10 AM
