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Latest Jeep Repair and Ignition Switch Installation Advice

CarJunky AutoAdvice

88 Jeep Wrangler

Showing 8 out of 10 Posts | Show 2 Hidden Posts
Question From Ski on 88 Jeep Wrangler

My Buddy is working on an 88 Jeep Wrangler, It has the straight 6 Carbureted engine in it with Manual Transmission. The issue he is having is the engine will stay running when you turn the ignition switch all the way over but the second you release the pressure off the key the engine will die. He has replaced the ignition switch with no results. He has also replaced the computer and still nothing. He jumped over the key switch and still has not solved the problem... Does anyone have any other thoughts on this problem so he can get this resolved?

Thanks in advance for any Help..

Response From Discretesignals

With the ignition on, do you have battery voltage at the ignition coil?

Response From maddness13

Yes there is power at the coil.

Response From re-tired

just to be sure . there is 12v at the + side of coil with the key in the run position?

Response From Discretesignals

This doesn't make an sense. Has your friend removed the ignition switch from the column with the wiring still attached and manually used a pocket screwdriver or equivalent to slide the contact bar in the switch to start the engine? Maybe there is a problem with the linkage in the steering column?

Response From maddness13

The positive side of the coil had no power. I Think I have found the problem. The ignition control module. Found in the bottom of left fender under washer bottle. It looks like old ford brain box.I am installing a new one today. Cost about $120.00. I will let you know if this does fix the problem.thanks for the help.

Response From Hammer Time

That's a good way to throw away $120

Response From maddness13

Good news ! ignition control module fix it thanks guys

Response From Discretesignals

The positive side of the coil had no power.

So, the coil had power and then it didn't have power.

Just curious. What made you replace the ignition module? How did you determine it was bad? Just to let you know the ignition module doesn't supply power to coil. The power for the coil comes from the ignition switch. The module controls the coil's ground to charge and fire the coil.

Response From Hammer Time Top Rated Answer

Sounds like your testing was faulty because you said you had no power at the coil and that doesn't come from the Ignition module.

1995 Jeep Wrangler

Showing 2 out of 2 Posts
Question From Andell on 1995 Jeep Wrangler

I have a 1995 Jeep Wrangler (4 cyl) with 120,000 miles. This past weekend I was getting gas at the local station...as I tried to start the Jeep, it would not turn over, not a sound. I tried to jump the Jeep but was not successful. I tried to push start, again, not successful. I thought maybe my Battery had gone bad so I pulled it out and had it tested. It was good. I left the jeep at the gas station for (6) hours, then returned. I jump into the Jeep and it turned over just fine. It worked fine for the next several days then it happened again. No sound, not even a click...it seems like maybe the ignition switch is getting hot, or maybe a loose wire.

Thanks for any light on this subject.

Response From Hammer Time Top Rated Answer

You'll just have to catch it when the problem is present and start checking all the power supply wiring from the battery, through the fuses to the ignition switch. If you have no headlights either, concentrate on the engine compartment.

2000 Jeep Grand Cherokee starts fine shuts off after a few seconds

Showing 3 out of 14 Posts | Show 11 Hidden Posts
Question From kopeck on 2000 Jeep Grand Cherokee starts fine shuts off after a few seconds

I just replaced an ignition switch in a 2000 Jeep grand cherokee, Laredo. Prior to putting the switch in I left the jeep for 3 weeks without running. After installing the new switch I charged the battery fired up the Jeep only to find it ran for a few seconds and died(the jeep starts great just shuts off like it is starving for gas). I attempted to rev the engine which it did but just died. Someone told me to to spray a starter fluid into the intake , when I did the jeep would go to stall and then run as long as I fed it the fliud. Anyone have any ideas what I should try now??

Response From Hammer Time

Do you have any security light on or flashing when you try to start it? If not, have the fuel pressure read with a gauge.

Response From kopeck


I checked out the jeep,you know usually I have a red light that flashes on my dash and it is not flashing could something be up with my anti-theft or security since I changed my ignition switch??

Response From Hammer Time

It certainly could.

Response From kopeck

Any suggestions on what to do?

Response From Hammer Time

If you have a problem with the factory security system, then diagnosis is beyond your capability because you will need factory scan tools.

Response From kopeck Top Rated Answer

Hammer Time;

Friend has a scanner he just bought, we are going to give it a try tonight I will let you know what the outcome is. I definitely think you nailed the issue though. I also spoke to the folks that sold me the ignition switch and confirmed your observation.

Response From Hammer Time

I don't know what your friend bought but if he didn't pay over $4000 for it, it's not going to do the trick and even some of them won't.

Response From kopeck

Paid $5000 and changed didn't make over yesterday coming over tonight keeping fingers crossed

Response From Hammer Time

That should be able to read it.

Response From kopeck

This keeps getting better, spoke to Dealer they said some of the electronics on the older Jeeps can't be reprogrammed, suggested I reinstall the old electronic ignition along with my old lock set, to see if that helps. I'm going crazy here. But your continued efforts are appreciated.

thanks Kopeck

Response From Hammer Time

That could be true. Many cars have to replace the security module when the ignition is replaced if it uses a dedicated module that's not programmable. GM did it with Passkey for years.

Response From Tom Greenleaf

IDK - This begs lots of info. Why did the ignition switch need replacing to begin with?
Was the battery dead as you said you charged it to start it after 3 weeks?

Do you know how this security system is supposed to work if it works properly? It used to blink now it doesn't?

Aftermarket set up or what?

Not sure it's even involved but it sure lacks fuel by description or fuel delivery. That could be a failure of empowering fuel pump after cranking or perhaps it just can't keep up at all OR injectors quit getting a pulse.

Need to start ruling things in or out but think some issue with security system is part of it so far,


Response From kopeck

Cool will check it out when I get home from office...will keep you informed!!