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XJ Ask the Question Thread
CF Veteran
Join Date: Jul 2010
Location: 802
Posts: 4,930
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Year: 99
Model: Cherokee
Engine: 4.0
You guys have been awesome, thanks for all the help with this. So we're all up to speed with this:
-99 XJ, 174k, AW-4, NP-242, OEM spec everything.
-New everything: TPS, IAC, o2, ECM, Refreshed battery leads/ground, refreshed PDC harness and checked fuses/swapped relays, all grounds- oil dipstick, firewall to back of head (braided line), the one on the driver side wheel arch by ECM.
After discovering/replacing the broken dizzy cap it fired right up. Hadn't done this in a week and a half. No more rough idle, hesitation, no high end rpm's. Then, after 4 miles it threw the o2 sensor high circuit code.
Then I drove it more and I got this:
-99 XJ, 174k, AW-4, NP-242, OEM spec everything.
-New everything: TPS, IAC, o2, ECM, Refreshed battery leads/ground, refreshed PDC harness and checked fuses/swapped relays, all grounds- oil dipstick, firewall to back of head (braided line), the one on the driver side wheel arch by ECM.
After discovering/replacing the broken dizzy cap it fired right up. Hadn't done this in a week and a half. No more rough idle, hesitation, no high end rpm's. Then, after 4 miles it threw the o2 sensor high circuit code.
Then I drove it more and I got this:
CF Veteran
Join Date: Jul 2010
Location: 802
Posts: 4,930
Likes: 0
Received 3 Likes
on
3 Posts
Year: 99
Model: Cherokee
Engine: 4.0
CF Veteran
Join Date: Jul 2010
Location: 802
Posts: 4,930
Likes: 0
Received 3 Likes
on
3 Posts
Year: 99
Model: Cherokee
Engine: 4.0
Just refreshed it. I've been all over the wiring harnesses found a weak/exposed area and taped it up. This was a while ago. Worth more effort in actually fixing it I'm sure.
CF Veteran
CF Veteran
Beach Bum
CF Veteran
Join Date: Jul 2010
Location: 802
Posts: 4,930
Likes: 0
Received 3 Likes
on
3 Posts
Year: 99
Model: Cherokee
Engine: 4.0
Before o2 high code (first code) it was hesitating while in 4th and trying to accelerate. The hesitation quickly turned to the rough idle with one stall. It hesitated under any throttle and would bog out if given too much throttle. Then after more driving I got all the misfire codes.
CF Veteran
Figured it should be.
I've read here where replacing the heater cores in these XJ's is a chore. I tell you though I don't see how it could be any more than replacing the one in our '96 Blazer LS. Two man job.
I've read here where replacing the heater cores in these XJ's is a chore. I tell you though I don't see how it could be any more than replacing the one in our '96 Blazer LS. Two man job.
Senior Member
Join Date: May 2012
Location: Fayetteville, NC
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Year: 1996
Model: Cherokee
Engine: 4.0
Why does my low washer light come on when it is 3/4 full? I think that is a common thing just didn't want to search for a logical explanation.
Senior Member
Join Date: May 2012
Location: Fayetteville, NC
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Year: 1996
Model: Cherokee
Engine: 4.0
Another random thought as I'm reading up on gauge accuracy and needing to confirm it, does anyone have a custom dash / gauge cluster?
CF Veteran
Before o2 high code (first code) it was hesitating while in 4th and trying to accelerate. The hesitation quickly turned to the rough idle with one stall. It hesitated under any throttle and would bog out if given too much throttle. Then after more driving I got all the misfire codes.
Beach Bum