G'day guy's. I just bought ( a month ago) my first wrangler, a YJ. the body is great but I have an intermittent problem. It started with the jeep not starting, (no spark) changed the Coil, no joy. replaced the oil pressure sensor it would start when i wriggled the connector. No joy! i was now out of my depth. I had it towed to a shop. they replaced the spark module, and woohoo I had a running jeep. That week end I left on a road trip, and it stared to back fire and (the only way I can explain it) shut down. I can restart it and it will run doing this on off thing at different times. some times it will run fine for an hour and then start the stop start thing again. If you are still reading this and have any clues PLEASE HELP ME!!! I'm now starting to think it might have a bad ground.