1998 4.0 AW4
I just cant seem to get my engine to run smoothly. I have had problems since the day i bought it. I have got it better, it all started with a damaged upstream 02 sensor wire. Fixed that, replaced broken cat with a new one. But it still dosnt run smooth. When its ideling it has a slight rough idel,and occasional when i smoothly accelerate it likes to just slightly hesitate.
i hooked up a scan tool and the thing that seemed weired was the up stream o2 sensor kept switching from rich to lean readings, back and forth constantly, what could be causing this, could this be the root of my problems?
Iv had the jeep for amost 3 years now and ive replaced i think about all the sensors in my quest to cure it, i thought buying a newer jeep would be better but my 89 ran 10 times better then this one.
I just cant seem to get my engine to run smoothly. I have had problems since the day i bought it. I have got it better, it all started with a damaged upstream 02 sensor wire. Fixed that, replaced broken cat with a new one. But it still dosnt run smooth. When its ideling it has a slight rough idel,and occasional when i smoothly accelerate it likes to just slightly hesitate.
i hooked up a scan tool and the thing that seemed weired was the up stream o2 sensor kept switching from rich to lean readings, back and forth constantly, what could be causing this, could this be the root of my problems?
Iv had the jeep for amost 3 years now and ive replaced i think about all the sensors in my quest to cure it, i thought buying a newer jeep would be better but my 89 ran 10 times better then this one.