jeephack Posted November 27, 2010 Share Posted November 27, 2010 What would be the most common cause for a 4.0 engine to jump timing. I drove my Comanche to the woods this morning to go hunting. Everything ran fine. When I got ready to leave, The engine would turn over, but it would not fire. After some tinkering, I finally got it to start, but it won't idle, and it runs extremely rough. Not to mention, it smokes like the woods is on fire. I know that the timing has somehow gotten waaay off. Quote Link to comment Share on other sites More sharing options...
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