Alright guys so my xj was sputtering/losing power, ive posted about it a few times. Checked my fuel pressure(49psi), compression was great, did a full tune up, and something still has it running funny. My jeeper buddy said it could be bad gas or the beginning sign of a bad CPS. Anyone know if a bad cps would do that?

 

If it was the CPS it wouldn't cause it to sputter. A bad CPS would cause it to just dye or make it take a long crack time to start. That is if it will start.

 

My first thought, o2 sensor. Get it on a code reader! Get rid of guess work!

 

Having the same problem in my 2000. Already changed the coil pack and still have a misfire on cylinder six. Started right after getting gas. My fuel pressure, compression, injectors, etc are all fine. Going to check the plug tomorrow.

 

clean engine grounds and battery terminals.

 

A cyl. misfire is different.. Keep us posted..

 

Its not throwing any codes, no check engine light this whole time! thats why this is killing me haha

 

didnt even think to clean the engine grounds, battery and terminals just got done last week. where are the engine grounds located? on the firewall?

 

theres the one on the firewall on the driver side and there was one on the paasenger side that went from the block to the battery if i remember correctly. im pretty sure there was a diagram somewhere i just cant seem to find it.

edit. here it is. http://www.lunghd.com/Tech_Articles/...und_straps.htm

 

Going to check them out now, thanks!

 

good luck.