I was driving home from my parents house going about 70 down the highway fourth gear about 2700 rpms. All of a sudden my jeep hichups and the speedo dives to like 45-50 it then climbs straight back up to how fast i am really going and everythings fine...it did this several times and i don't know what it is. It feels like i hit the govener but going 70....i've 105 in it and i didn't hit that thing. It also did it in third and fith a couple days later, and another thing it is dyin on me if i let it idle for longer than about 4 minutes in the driveway? any suggestions. thanks hag

If that thing has a fuel filter in it I'd advise starting there.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

You got some wierd electrical failure going on... I'd agree with BJ that it's a filter, but the speedo shouldn't be jumping. Are there any engine codes?

the fuel pump, filter were replaced about 8 months ago and how do i check the codes??? no sevice lights have come on?

If it misses every once in a while, the computer usually doesn't turn on the engine light. I don't know if there is a fast easy way to get codes from a TJ. Check the Chilton. Probably the best way is at a local JC.

I would start with a tune up new plugs (stock) check the wires... ETC. You might find something simple wrong.