Originally Posted by 87manche17
I went to the grocery store today in my 87 MJ, and when I started it while it was cold it started and ran fine. When I turned the truck off to go in the store I came back out and it wouldn't start. I got a ride home and let it sit in the parking lot for about an hour. I came back and it fired right back up. My conclusion is it will not start when warm, Ive already changed my CPS on the bell housing still no change. It has a new coil and control module so it cant be that. I'm thinking its the stator in the distributor, could that be it or something I haven't though of?
The stator in the distributor is certainly a primary suspect.
When they fail thermally (heat related), the 4.0 engine will continue to run on the latest signal from the stator, but when the engine is turned off, it won't start unless that component is giving valid input data to the computer.
I'd recommend you replace that component. Not particularly expensive and shouldn't be too bad to replace. Refer to a maintenance manual if you have one.
Good luck and keep us updated!