GOT Grand just dies

[Jostaman]

every so often just die will not restart, play with fuses and it start, sometimes play fuses and nota. wonder if it is vapor lock, just run up to store park do my shopping come back starts right up go accross parking lote and bom it stops, starting turns over fine, just no start. any ideas I have no idea, and since I am by my self when it happens makes hard to trouble shoot, any one got any ideas what it is or procedure for figureing it out?

[nate]

check fuel pressure...thats what my XJ did when i had a fuel leak in my tank. If the pressure is low do the leak down test, if it passes the leak down it is the fuel pump...if not you have a leak somewhere.

A service manuel will tell you how to do everything. GOOD LUCK!

[JamesT]

Take everything off the throttle body, as much as you dare to, and clean it out with some carb cleaner. It sounds like the IAC is clogged or going bad, probably clogged.

[Jostaman]

itbis a grand cherokee 93 is it not fuel injection? I will try the fuel pressure test once i figure out what that is. thanks

[AZXJ]

is this a full size cherokee or a Grand Cherokee?? if it is a Grand it is fuel injection. what engine do you have ?

[ZonaWrangler]

A service manuel will tell you how to do everything.

And a service Hank will rip you off!

[Jostaman]

It is a grand cherokee got the 6 banger in it.

Thanks

[AZXJ]

did you try unplugging the Crank sensor and cleaning the plug out??

[JamesT]

itbis a grand cherokee 93 is it not fuel injection? I will try the fuel pressure test once i figure out what that is. thanks

Unless someone changed out the motor, fuel pump, computer and everything else in that system, it has fuel injection. All '93 Grand Cherokees that year were fuel injected, both with the 8 and the 6.

If it doesn't have fuel injection, you really ought to tell people more about the modifications that have been made to it before asking them to help you solve your problem.

Good luck.

[Jostaman]

6 banger what else do you need.

thanks

[Linda]

Having owned a 1993 ZJ 4.0L I can feel your pain in not getting good advice. Chrysler products (including Jeep) in 1993 and 1994 were notorious for having electrical problems. I put up with those for several years before I finally decided I had enough. That trip to Moab was the final straw (intermittent ignition coil failure which produced the same symptoms you are dealing with right now). I won't own another Jeep product (Chrysler or DCX) after that adventure.

Stalling issues with these vehicles can be caused by a number of electrical parts on that vehicle. You will see people on this forum throw out a whole bunch of suggestions as to what to replace. That's because Chrysler-Jeep (not DCX back in those days) went through several revisions on their CPSs, TPSs, MAPs, IACs, etc. Sometimes those parts have to be ordered by VIN rather than by year and model. The newer Jeep models have much better electronics on board.

Getting back to your problem. Since I went through the same thing over and over again Here are my recommendations.

(1) If you have the FSM and a voltmeter, you can check most of the electrical parts yourself. The instructions for testing are pretty straightforward. Actually, I would suggest carrying the FSM and a voltmeter with you everywhere you go. Put them in the space under the back seat.

(2) This is probably a little more expensive since it might require towing. [I had my ZJ towed home at least once a year due to electric problems.] Drive the car until it fails to start. At that point it should be fairly easy to figure out what's wrong. Chances are it will be either the IAC or the ignition coil. I was replacing ignition coils every year when the weather got hot. You can have AutoZone test the coil. I had to replace the IAC twice. Aftermarket parts have the same lifespan as OEM parts so the brand is not important.

Additionally, the 1993 ZJ models (both I6 and V8) have a light switch on the rear hatch. This switch didn't have a good seal to keep the weather out. Once it starts corroding, it will drain your battery one milliamp at a time. :mad:

If you plan on doing really hard 4-wheeling with your ZJ I can tell you it is a great vehicle for that sort of thing. Just make sure you are very diligent in doing your "before and after 4-wheeling" maintenance and stay on top of the PM. I never had any problems on the trail that left me stranded -- of course that might have been pure luck more than anything else. The only unibody cracking I experienced was in the rear hatch. The cracking took out the latch, but we were able to resecure it. I had a custom 6" coil lift and stayed with the short control arms. I added subframe connectors to maintain body stiffness as a PM measure.

Good luck!