So heres the deal,
I went riding and came to a point where there was a tree on the trail and when I went over it, im guessing a branch riped my caty off (not completly,just dangling) instantly i noticed my jeep was LOUD and the check engine light came on.

Got the caty put back on and the check engine light was still on. After about a day or two my jeep started "sputtering" and loosing power. When i was driving my Check Engine light was flashing like a pulse. Immediatly I got it towed him and now im trying to locate the problem.

It starts awesome,. even idle great, I can rev it in Park or Neutral and still seems fine, but when I put it in drive and start rolling well that when the sputtering kicks in and notice the power loss.

Please help.. I love my Xj but man she gives me problems/

 

When your cat was damaged, how are the 02 sensors? a shorted o2 can donasty things as well. when your check engine light flashes it usually means misfire, hows the tune-up stuff??

 

You must have danaged the harness for the o2 sensor, and that's what set the CEL. The light flashing is a warning not to drive far it's in limp mode. Check the codes this way: Jeep Horizons :: View topic - Jeep Computer codes (OBDI & OBDII)

 

get the computer scanned, should tell you where to start.