XJ stuttering

[ChrisMc]

Sometimes on start up the jeep stutters. Ill be giving it gas and there's little power only at slow speeds. Recently while driving its starting to buck while going faster (feels mechanical to me). Its only started since I put my stock front driveshaft back in (coincidence or could it be binding?) locked in the front as well

Any ideas?

Description:
1999 XJ
6.5" Long arm
4.0L
215k


Replaced with a couple years:
Plugs
Wires
Cap
Fuel Pump/filter
CPS
Clutch within 5k miles (dont think its the tranny slipping)


Im gonna remove the front driveshaft and see what happens. More than likely will seafoam to clean.


Thanks

 

[BigClay]

Clogged cats, dirty AIC, bad CPS?

 

[ChrisMc]

Possibly the cat, I forgot I just did the cps too. Anyway to clear the cat or should I just invest in a high flow?

 

[BigClay]

With it being a 99, you need the cats, and there is no way to clear them, just have to buy new ones.

 

[Tradarcher]

I had the same thing going on with my jeep. I replaced both 02 sensors and that fixed the problem. May have only been one of them but I did both. When I bought the jeep the cat was rattling. I replaced it but did not replace the sensors for a few months. As soon as I replaced them no more problems.

 

[Tyler Pienta]

I had a similar problem and the solution was to re-index the camshaft position sensor. Now it runs great!