95 wrangler running rough

[rjeepr]

i have a 95 4cyl. it starts and idles good. after a few minuites of driving it starts to spit and sputter. it does this until the check engine light coms on then it runs like a champ again.i pulled the code it said 33. that comes out to be a/C fan relay. i dont have ac never has. plus there is no ac fan relay in the fuse block. checked my old wrangler and that never had the rely so why am i getting a ac fan rely if i dont have ac? any thoughts would be awsome.

[smichaelR22]

sounds like an 02 sensor, or a tps-  its going to to limp mode when you say it runs like a champ.  probably 02, it wouldnt have any throttle response in limp if no tps function.  bad 02 could be pulling down the signal or response that may or may not be some how connected to the Ac relay input (thats not there) on the ecm?


unplug the 02 sensor(s) force it to limp right away. if it does id start there.  

[MrMindless]

ditto what smike said.  as I was reading along I was thinking clogging catalytic until you said it comes back to life.  that almost guarantees a bad sensor. Code 33 is odd.

[rjeepr]

Ok thanks guys. unpluged o2 sensor and no more spit and spudder. check enging comes on after a few miles but it runs good before and after.