Jeep Cherokee Sputter
#1
Jeep Cherokee Sputter
1996 Jeep Cherokee 4.0 HO Auto trans, so I've been getting a sputter mostly on acceleration, it has backfired before and stalled, then I started it back up and it ran fine for a few weeks, now it's starting to sputter again. The check engine light is on for the downstream O2 sensor, but I don't have a cat(how the jeep came) and the sensor connector is just hanging out down there. New TPS new CPS new filter new pump good fuel pressure. I just think that it's interesting that it would run fine and then sputtering on and off? Could the downstream O2 sensor act up like that? I think I may have an exhaust leak too Thanks
#2
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Join Date: Mar 2010
Location: Georgia
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Year: 99 94
Model: Cherokee (XJ)
Engine: I6
Disconnect the front o2 sensor and see if it runs better.
It's probably bad also.
Replace your cat with a cheap one from performance-curve and get your exhaust and sensors set up correctly.
Not allowed to talk about running without a cat on this forum.
It's probably bad also.
Replace your cat with a cheap one from performance-curve and get your exhaust and sensors set up correctly.
Not allowed to talk about running without a cat on this forum.
#3
oh.. Wasn't aware of that, no emissions where I live, but anyways, I unplugged the TPS and it changes at idle so I'm assuming that is still working right.. I unplugged the upstream o2 sensor( I replaced this fairly recently, it was from Bosch I think) and it didn't change at all and the sputter is still there when I drive around. I thought the downstream o2 sensor controls the cat emissions and has nothing to do with fuel/air ratio?
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