For the past 3 weeks I have been having an issue where the jeep randomly dies on me or, "bucks" (attempting to stall) on me. It doesn't matter what temp the outside air is, or if the jeep has been warmed up or cooled down. What happens is the following, it will buck ( gas gauge will drop half a quarter tank) Middle console read out ( Example : 250 miles to empty to 200 miles to empty) Then it bucks again and gas gauges return to normal. Sometimes it dies on me completely. I have changed the fuel filter, added carb cleaner, about to change crank sensor. I have seen people talk about the PCM, which I have yet to look at, mainly because I have no clue how to check if its bad, (Ohms output) and such. I also heard things like, computer wire is rubbing bad somewhere, or clogged cat, but only once i smelled the rotten egg smell from the exhaust. ( Which if the crank doesn't work then that will be my next option. Any other Ideas and how too's will be much appreciated!

 

Oh, and I have hooked up a auto coder to the computer while driving. No codes... only odd thing is when it bucks all 02 sensor read outs go from 0.4-0.6 (normal range) to 0.999 (durning or the next second after the bucking.)