24th Jul 2010, 16:56
I just bought an 88 Jeep Grand Wagoneer. It was a dream come true to finally own one. However, I am having the same problem. Mine always starts just fine, but whether it is an hour later, or 10 minutes later, it will quietly cut out. That is guaranteed whether the engine is hot or cold, my Wagoneer will suddenly die. I have been driving on Highway 1 over Devil's Slide at 30 mph and had it cut out, no warning.
Driving in the city, it has been known sometimes to cut out every five minutes. Beautiful car but absolutely no fun.
Previous owners have replaced hoses, ignition module, wiring, transmission elements, valves, carb needles, bypass heater pip, transmission mount, seals of all kinds, thermostat, fan clutch alternator, regulator, sensors --- you name it --- and still it stalls without warning. It backfires going down hills, and seems to stall more frequently going up hills.
I also would appreciate any information from people who have fixed this problem. I love my Wagoneer, and do not want to let go of my dream car!
17th Aug 2010, 18:56
Maybe an answer to your stall out problems on your 1988 Wagoneer; check the ignition module, it sits over the driver's side tire under the hood. A couple of 3/8 or 7/16 hold it on; they unscrew from underneath, or if you look up at the 1 o'clock position above the driver's tire, you will see the bolt heads. Very common for these to be the problem. Usually they cost around 75 dollars to replace, unless you go after market, then they can get spendy. Anyways, good luck; they're awesome machines when they run right.
12th Jun 2011, 06:32
Had similar problem with a 75 FSJ Cherokee and 79 J10, and it turned out to be the bulkhead connector to the main wiring harness on the firewall. Drove me nuts till I found it. All you had to do was move it a little bit and it would shut off. Z & M Jeeps http://stores.zmjeeps.com/StoreFront.bok offer exact replacements for all the wiring harnesses for these rigs at I think a very reasonable price, considering what you can get yourself into trying to repair one.
31st Jan 2010, 11:18
Did you ever figure out why your Jeep "continues to stall out while driving, or won't start after use. Not always, just sometimes"?
I'm having the same issue with my Jeep... after I drive around for about 15 minutes and make multiple stops... it just will not start (I have to wait for approx one hour and then it will eventually start).
I replaced the carburetor, vacuum lines, fuel filter and have no clue what the issues are?? If you found the answer, please respond to the post as I am looking forward to when I can rely on my 88' Grand Wagoneer 100% of the time.
If able, please send response to my email address: bwkimmell@gmail.com
Bruce.