I just bought an 88 Grand Wagoneer for my wife as she's always loved them. We drove it overnight 300 miles back from Miami with no trouble.
The next day we drove it in the heat - after about an hour of driving in 90 degree Florida heat it stalled while driving at about 30mph. Engine would not turn over when the key was turned.
After towing it back to our mechanic friend's house, it started up as if nothing had happened.
His first suspect was the battery, so we had the battery and alternator tested at Autozone and both passed.
- Fuel pump
- Ignition module
- Battery top ends
- Fuel filter
Our mechanic drove it around in the heat for an hour or so the next day, and it had no trouble.
We took it home the next afternoon, filled the gas tank and 100ft down the road it stalled again. After 45 minutes of sitting and priming the carb with gas it started up and we were able to drive it back home.
Starting up this morning took a few tries for it to turn over. This afternoon (after sitting in the heat while my wife was at work) it took 20 minutes to get it to start.
It also idles rough, if that helps to diagnose the problem. Not sure if these old Jeeps just idle rough anyway, though.
Any suggestions as to how to make it easier to start, or what I should try next to diagnose the problem?