Beginning to think it is a bad valve spring, or seat problem. The new o2 sensor didnt do a thing. It runs horribly first thing in the morning, and after a few minutes on the highway (70 mph ) its ok...still a little burp here and there, but not bad. This jeep has 264,000 miles on it. Its only worth like $600, so if its something internal, its done for.

 

THIS. Its honestly not hard to fix.. with all the troubleshooting and labor you have put in this so far you could have had the valves lapped already.

 

gonna try changing the CPS now. Hopefully that works!

 

It's not going to fix it.. your just throwing parts at it. Your what we call a 'parts slinger'.

 

well, thats the point isnt it? An OBD reader wont connect to the computer, says "error". So i have no choice but to change out all the parts that could cause a misfire. The CPS causes all the problems i am having ( stumble upon acceleration, poor fuel economy, rough idle, misfire, CEl illumination.) There isnt a specific code for the CPS, so hoping its it.
If its now, i have no choice but to scrap it. Like i said before, with over 263,000 miles, its worth $500. Why waste that same amount for a valve job or anything else internal?
Lastly, i have called all kinds of auto repair shops to see how much they will charge just to look at it and tell me specifically whats wrong with it...$90. So, a $7 part seems feasible at this point as its the only thing left to change.

 

fINALLY GOT HER FIXED. When i bought the CPS, i decided to alos start from the beginning and check everything. Took plug wires off, they were fine. Took cap off, it was fine except for #4 terminal, had some corrosion on it. Cleaned it, good to go. Took rotor off and noticed the end was slightly corroded and looked worn ( only a few momnth old ) so i bought a new one. All vaccuum lines were good. Spark plugs were all good except #4 and #2. #2 was bright white from being too hot and #4 had a cracked insulator. I suspect that was the main problem. Replaced these plut it all together and drove her around for a few miles. No more CEL, and no more sputtering or weird idling. Will find out for sure tomorrow, but just saved myself $72 on the CPS. Thanks to everyones help!!

 

Wow sounds like what I need todo to my jeep