I was on the trails today and I had some trouble getting started. I got stuck in a mud pit for about 10 min. and after some rocking was able to get unstuck. I was using a lot of high RPM to get out causing some heat. When I got to some flat ground I shut it down for a while to give it a break for about 5 min. When I got back in it started and sputtered out after like 5 seconds. Tried to restart and nothing. kept trying this for about 5 or so min. and nothing. Got out of it for a while and then tried again and it took some time but it started. It was not even running well enough to register on the tachometer. I added some fuel and that almost killed it. I let it run while gently easing the gas and the RPM rose some with a lot of sputtering and popping. It finally cleared up and I was on my way again. Does this happen often? If so what is a good fix?

I just realized this needs to be in the OEM section. Wasn't paying attention to where I was...OOPS

 

If you have an 00-01 it could be heatsoak in the injectors.

 

No, its a 96 it does have the 4.0 automatic

 

Did you happen to get the exhaust full of mud? Clogged exhaust could cause a symptom like that.

 

Yeah stuck in mud then rocking it back and forth could pack the exhaust full of mud.And with you running it might have blew all the mud out of the exhaust.

 

Next time leave the Jeep running after getting out of the mud pit. I know its counterintuitive, but the Jeep will cool itself faster and more importantly safer if it's on. This is because the coolant stops flowing when you shut the Jeep off. If you want to help it cool even faster then just pop the hood and turn the heat/fan on hi inside the cabin. Turning the Jeep off will cause a heat spike, and if I had to guess that is what had your XJ running rough and hesitant to start.

 

This. I just went wheeling yesterday in sand dunes and jeep was warm at 210 via guage. Left her running and propped the hood before I left for the day. Turning the engine off will cause the temp to rise an extra 20* sometimes maybe more because like said, nothing I moving or cooling

 

X2

Keep the fluids & air moving, and pop the hood to get rid of the hotbox. Probably wasn't due to mud packing in the exhaust, it would've died in the pit. This was very likely a heat soak issue, next time just follow Hopkin's tips above until she's back down to normal operating temps.

 

All I can say is X3

 

Ok, this does make sense. How do you fix heat soak? I know it's on here somewhere but if someone needs it it will be on here too. I do want to vent the hood somehow. Would that also help? And mud did get in the exhaust but it all blew out with RPM in the pit. Thank you for all of the replies.

 

Me personally.bibwrapped my injectors with insulation. And have hood vents. The wrapping helped me big time cause my 01 would have it. Now she purrs nicely even after an aggressive short drive

 

Is that the tape that looks like aluminum tape with fiberglass sandwiched in between that can be found at AutoZone?

 

Me personally, I used HVAC duct wrap. Shiny tape but no fiberglass. Yea its probably frowned upon but has lasted over a year with no issue. At the time I was able to get it fast from the other trades on my jobsite. I imagine the proper one from AutoZone is perfect

 

Would I just wrap up the injectors or the fuel rail too?

 

I just did injectors. Others will chime in. The fuel rail may be overkill since heat soak is happening in the injectors themselves with the fuel heating up before injecting into engine, or so how I understand it.