my cherokee runs weird
 

Ok so I bought a 98 cherokee the other night, the guy told me it needs a o2 sensor. Well today I was doing some light wheeling and I wasn't on the gas very much cause I was coasting. But it almost seemed to want to stall and then giving it some gas it would rev high then fall again then be fine until going back to the creeping along again. What could this issue be so I can narrow things down, could it be the O2 sensor? Any help would be greatly appreciated.

Darcie

Re: my cherokee runs weird
 

Did you check your codes out? One of them could be for a o2 sensor not reading properly.

Re: my cherokee runs weird
 

I have 5 codes P1281, p0132 p0135 p0141 p0138, I know the last 4 are for the o2 sensor and the first one is for the engine staying cold to long. Not sure how to fix that issue

Re: my cherokee runs weird
 

I believe it all has to do with the O2 sensor.Replace it first,clear the codes and retry.
Here's what I found...
1281 The engine is staying cold too long - check your thermostat.
the rest are O2 sensor codes.

Re: my cherokee runs weird
 

If I recall correctly, there are two O2 sensors. Replace both at the same time.

Re: my cherokee runs weird
 

Do yourself a favor and don't buy the cheap Bosch sensors, get the NGK's. Best place is from the dealership they are more accurate than the Bosch.

Re: my cherokee runs weird
 

thanks guys, so dad said that both need to be replaced anyway. and he also said that the first code could be the engine temp senor. i know where there is a junked grand cherokee at with a good 4l but i wouldnt take o2 sensors from that. any how i also noticed there is a clunk under my feet(on drivers side). the old fella seems to think i may have a bad tranny mount or a loose control arm bushing.

Re: my cherokee runs weird
 

Could also be the driveshaft or the balljoints. I'd check the balljoint first if it feels like it's right under your feet.

Re: my cherokee runs weird
 

Re: my cherokee runs weird
 

not saying im dumb i am mechaniclly inclined just wanted to know some general areas to look. hopefully ill be able to get everything in good working order. got a baby on the way and dont want my child traveling in a jeep that could break down and what not