A billion dollars to whoever figures this one out! - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 07-01-2003, 02:59 AM
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A billion dollars to whoever figures this one out!

Okay guys, here's the deal. Changed the oil on my friend's 1978 J10. It has a rebuilt 360 with 1,000 miles on it. After changing the oil we started it up, then tried to turn it off, but it wouldn't turn off! We figured the ignition switch on the steering column was busted, so we started driving it home. Going around a corner, the engine just died and would not start again. We then proceeded to replace the ignition switch, but it would still not start. Then we figured the alternator was dead because the lights had been dimming back and forth for the past week. So we replaced the alternator, and it still wouldn't start. THEN we figured it might be the ignition module (Motorcraft)...so we even bought one of those and replaced it, all to no avail. We also tried a new coil, but that didn't work. It cranks but will not start....we are not getting spark at the plugs or from the coil. The coil is a brand new MSD Blaster High Vibe coil...everything on the engine is new including fuel pump, distributor, wires, plugs, cap, rotor, starter solenoid relay switch, neutral safety switch, ignition switch, etc etc...EVERYTHING! However, we did not check the fuse panel, could there be a fuse that could be causing it not to start? Does this particular year (1978 SSI) have a resistance wire or ballast resistor? Could this cause it not to start? We are really stumped, and have replaced just about everything we can think of. EVERYTHING IS NEW, except for the key lock cylinder on the steering column! I'd give a billion dollars to anyone who can figure this out, but since we have just about spent that much buying these new parts, all I can give is my thanks!! HAHA Thanks....

RoB & Joseph
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post #2 of (permalink) Old 07-01-2003, 06:14 PM
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Re: A billion dollars to whoever figures this one out!

This have a delco alternator?...they have been known to short out and keep the engine running by backfeeding thru voltage regulator...this could have burned the mag pickup in the distributor....try removing wires from alternator...and changing distributor...and try starting engine...if it starts...replace alternator also.
post #3 of (permalink) Old 07-02-2003, 10:39 AM
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Re: A billion dollars to whoever figures this one out!

Do you have the MSD ignition box? I have the MSD 6A and the high vib coil in my 91 Wagoneer and had the same problem with the engine continuing to run with the key off. There is a resistor that needs to be put in line on the alternator wire (it is the small one on the alt. connector). This wire is solid not stranded. The resistor was included with the 6A. Hope this helps.
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post #4 of (permalink) Old 07-02-2003, 12:56 PM
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Re: A billion dollars to whoever figures this one out!

Everything is brand new EXCEPT the wiring. Before you ever spend any money verify that the wiring is good. That is where most problems with Jeeps reside.

Have you ran a wire off the positive post of the battery directly to the coil
and started it? That will tell you about the original wiring...whether it is good or not. Start there.

Lights. I don't remember if that year had relays or they were run through the dash lighting switch AND the high/low beam floor switch. Anyway, clean all the connections inside and outside the vehicle associated with the lights. That usually works.
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post #5 of (permalink) Old 07-03-2003, 09:10 PM
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Re: A billion dollars to whoever figures this one out!

1. Look HERE...
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post #6 of (permalink) Old 07-05-2003, 03:12 PM
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Re: A billion dollars to whoever figures this one out!

you hooked the baby blue wire from the ignition to starter selenoid up to the wrong post, or your selenoid is sticky, tap it with a wrench
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