Jeep Shutting off While Driving now

[silvercert]

Been having this issue

http://www.ifsja.org/forums/vb/showthread.php?t=162997

But now it is shutting off while driving regularly now. Cuts off like ive turned the key off, just straight dies. Throw it in neutral and starts right back up everytime. Not running bad either just shuts off.

I have been persuaded by the suggestions in the last thread towards an ignition modual but I want to narrow it down before I just throw money at it.

[The Anti-Chrysler]

My first guess before I read you'd heard from others is the ignition module. Textbook symptoms, although its not guaranteed. Most people, myself included, always carry a spare anyway, if you were worried about wasting money throwing parts at it.

[joe]

Guessing a duraspark system? So ign module does seem suspect and yeah go buy one if you don't need it now "you will eventually" so buying one isn't wasted money. A spare should be a standard glovebox item. Only thing makes me not suspect the IM is that it'll restart immediately while still rolling. My experience with IM's though is different. When they start to go bad they overheat/cook themselves and shut down. Then need a cool off period. May be in as little time it takes to pop the hood, go oh crap, fondle a couple items and get back in the car and it'll restart. Some times(usually) cool time is many minutes. In your case I'd check, clean, tighten the batt cables at the battery. And the coil connections while looking for chafing/shorting wires. If loose or dirty it doesn't take much of a bump or vibration to momentarily break the connection. Could be a fuel issue but those act different, usually involves some surging or stumble prior to shut down and not like the key being switched off.

[serehill]

YEP My analysis/Guess hasn't changed I don't carry spares though

I just use MSD.

[silvercert]

Just changed ignition module....... didn't fix it. Still shutting off.

[serehill]

unreal

Coil or dizzy pick up.
Gas just doesn't cut off.
Check all connections.
I've never seen a coil come back immediately or an intermitent pick up.
BUT there's a lot of things I haven't seen.
Every time I've lost a dizzy pick up it was gone.
Coils can overheat & shut down but they don't fire right back up.
Sorry you're having a problem?
Does it do this while you're driving down the road or while you deaccelerating' sitting at a read light?
Hate to see parts changing but sometimes virtual work is a lot of assumptions.
Have you check for pinched or bare wires?
Do your gages keep on working when this happens?
Are all connections & grounds tight?

[silvercert]

Coil or dizzy pick up.
Gas just doesn't cut off.
Check all connections.
I've never seen a coil come back immediately or an intermitent pick up.
BUT there's a lot of things I haven't seen.
Every time I've lost a dizzy pick up it was gone.
Coils can overheat & shut down but they don't fire right back up.
Sorry you're having a problem?
Does it do this while you're driving down the road or while you deaccelerating' sitting at a read light?
Hate to see parts changing but sometimes virtual work is a lot of assumptions.
Have you check for pinched or bare wires?
Do your gages keep on working when this happens?
Are all connections & grounds tight?

Happens while driving down the road and while sitting in drive or park and at start up ...originally it was only after start up but now while driving... checked over wires this afternoon and didn't see anything fishy.

[Pman]

Serehill may have nailed it. I had this problem and it was the distributor pick up coil. Cost a whopping 7.00 I think?

[serehill]

Was yours doing the shut off strat right back UP??

Serehill may have nailed it. I had this problem and it was the distributor pick up coil. Cost a whopping 7.00 I think?

anything is possible it still sounds like Ignition.

[Pman]

Yes, my issue was random shut off, fast startup. I had replaced the ignition module (and I agree; this usually is the culprit), that didn't work, then I changed the ignition switch. Oddly, the problem didn't reappear for a couple of weeks and I felt confident that was it. Then it happened again. One trend I did notice was that I was having a harder time starting back up. Eventually, it completely crapped out in my driveway and wouldn't restart. Replaced the pickup coil and all has been good.

[babywag]

Wiggle test.

Thick gloves engine running watch the fan!
wiggle the distributor wires/plugs, coil wiring/plug, ignition module wiring/plugs.

My bet would be the coil wiring (it is 26yrs old)

[hookedup50]

Wiggle test your fuseable links. I had that issue and switched to HEI thinking module was going but it was fuseable link that was cracked under insulation. It took me a long time to find issue. HEI was best un necessary fix/upgrade ever. I went from 9 to 12 mpg by mistake.

[serehill]

LOL

Wiggle test your fuseable links. I had that issue and switched to HEI thinking module was going but it was fuseable link that was cracked under insulation. It took me a long time to find issue. HEI was best un necessary fix/upgrade ever. I went from 9 to 12 mpg by mistake.

Sounds like something I would do. But at the end of the day

[TexasJ10]

Wiggle test your fuseable links. I had that issue and switched to HEI thinking module was going but it was fuseable link that was cracked under insulation. It took me a long time to find issue. HEI was best un necessary fix/upgrade ever. I went from 9 to 12 mpg by mistake.

I had this problem years ago and it turned out to be a bad connection at one of the fusible links. Since they are crimped, and taped, it is hard to see the problem.

[silvercert]

Wiggle test your fuseable links. I had that issue and switched to HEI thinking module was going but it was fuseable link that was cracked under insulation. It took me a long time to find issue. HEI was best un necessary fix/upgrade ever. I went from 9 to 12 mpg by mistake.

Which Fusible links