Constant quitting

I have a 94 Jeep Wrangler 4.0 straight 6 that has developed a horrible problem with quitting. At first it would do it at an idle, now it will do it when everything seems to be going good while going 40MPH down the road. When the problem first started I would be able to start it back up right away, but tonight it wouldn't start again. Thank god it started again after I let it sit for a minute, but I had to crank it like 8-10 times before it would start, I thought I was stranded for sure for a minute there. It has gotten progressively worse and now I don't trust it at all, needless to say the next place I drive it to will be the mechanic. A couple things that may or may not be important, I really pushed it hard earlier that day to pass a group of cars, and it seems to run worse after I work the engine hard. It has 107,000 miles and has had a tune-up recently. Any help or suggestion is much appreciated as I do not wish to go to the repair shop completely uninformed.

Thanks

:confused:

Now I don't know what to think. Today I took it to work it ran fine, like the day I got her. I love my Jeep but this needs to stop. Anyone have any clue as to what could possibly cause such inconsistancy?

The most common causes of the problem you describe are: 1. Plugged fuel filter 2. Crankshaft position sensor ( 4 cylinder ) camshaft sensor (6 cylinder ) 3. Fuel pump shut off relay located near the battery tray. The relay is an $ 8.00 part at NAPA and takes less than a minute to change. The fuel filter is an easy fix too but the cam sensor can be a real pain in the ass because it's under the backing plate in the distributor.

Thanks for the feedback, the fuel filter is ruled out as I just changed it when I changed my oil. I will replace the fuel pump shut off relay, hopefully that will take care of it, thanks again.

"The stalling could be a fuel delivery problem, clogged filter, or bad gas. It could also be a bad catalytic converter, they will choke the engine after getting up to operating temperature."


I read this on another site. Could a bad cat also be a possiblity? I will fix the easy things first, but my cat and muffler look like crap and may need to be replaced, just thinking out loud here, any other opinions are welcome.

All above are valid points I also have seen bad fuel pumps that start to drop off pressure as they get run for a while, could check for fuel psi at the rail. with a hose extension you can drive it with the gauge on and look for dips in pressure, or for it to drop completely off with a stall.