'91' XJ: 02 sensor, rich mixture and cat-con
 

I got so busy that I didn't have time to swap out my 02 sensor w/the shredded
wiring harness (big thanks go to the stealership mechanics who installed it the
first time and didn't think to check the prop shaft clearance to the 02 sensor
wiring harness). The upshot is that the engine was running rich for maybe 4
months. Is this enough to do in the cat-con? How much does it cost to get the
cat-con replaced?
-Bill (remove "botizer" to reply via email)

Re: '91' XJ: 02 sensor, rich mixture and cat-con
 

I don't know for sure, but if that broken wire was going to really
affect the running of the O2 sensor, it would have set off the check
engine light permanently and set a code like disconnecting it will do.

I think you mentioned you had a check engine light once that was fixed
by tightening the loose gas cap, so that O2 wire isn't that old issue.

Has your mileage gone lower?

Does it kick out lots of black smoke when you goose it?

Do you smell the rotten egg smell of a cat with too much gas in it?

If not, I would just fix the wire and see what happens.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Wblane wrote:
>
> I got so busy that I didn't have time to swap out my 02 sensor w/the shredded
> wiring harness (big thanks go to the stealership mechanics who installed it the
> first time and didn't think to check the prop shaft clearance to the 02 sensor
> wiring harness). The upshot is that the engine was running rich for maybe 4
> months. Is this enough to do in the cat-con? How much does it cost to get the
> cat-con replaced?
> -Bill (remove "botizer" to reply via email)

Re: '91' XJ: 02 sensor, rich mixture and cat-con
 

I don't know for sure, but if that broken wire was going to really
affect the running of the O2 sensor, it would have set off the check
engine light permanently and set a code like disconnecting it will do.

I think you mentioned you had a check engine light once that was fixed
by tightening the loose gas cap, so that O2 wire isn't that old issue.

Has your mileage gone lower?

Does it kick out lots of black smoke when you goose it?

Do you smell the rotten egg smell of a cat with too much gas in it?

If not, I would just fix the wire and see what happens.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Wblane wrote:
>
> I got so busy that I didn't have time to swap out my 02 sensor w/the shredded
> wiring harness (big thanks go to the stealership mechanics who installed it the
> first time and didn't think to check the prop shaft clearance to the 02 sensor
> wiring harness). The upshot is that the engine was running rich for maybe 4
> months. Is this enough to do in the cat-con? How much does it cost to get the
> cat-con replaced?
> -Bill (remove "botizer" to reply via email)

Re: '91' XJ: 02 sensor, rich mixture and cat-con
 

I don't know for sure, but if that broken wire was going to really
affect the running of the O2 sensor, it would have set off the check
engine light permanently and set a code like disconnecting it will do.

I think you mentioned you had a check engine light once that was fixed
by tightening the loose gas cap, so that O2 wire isn't that old issue.

Has your mileage gone lower?

Does it kick out lots of black smoke when you goose it?

Do you smell the rotten egg smell of a cat with too much gas in it?

If not, I would just fix the wire and see what happens.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Wblane wrote:
>
> I got so busy that I didn't have time to swap out my 02 sensor w/the shredded
> wiring harness (big thanks go to the stealership mechanics who installed it the
> first time and didn't think to check the prop shaft clearance to the 02 sensor
> wiring harness). The upshot is that the engine was running rich for maybe 4
> months. Is this enough to do in the cat-con? How much does it cost to get the
> cat-con replaced?
> -Bill (remove "botizer" to reply via email)

Re: '91' XJ: 02 sensor, rich mixture and cat-con
 

I don't know for sure, but if that broken wire was going to really
affect the running of the O2 sensor, it would have set off the check
engine light permanently and set a code like disconnecting it will do.

I think you mentioned you had a check engine light once that was fixed
by tightening the loose gas cap, so that O2 wire isn't that old issue.

Has your mileage gone lower?

Does it kick out lots of black smoke when you goose it?

Do you smell the rotten egg smell of a cat with too much gas in it?

If not, I would just fix the wire and see what happens.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Wblane wrote:
>
> I got so busy that I didn't have time to swap out my 02 sensor w/the shredded
> wiring harness (big thanks go to the stealership mechanics who installed it the
> first time and didn't think to check the prop shaft clearance to the 02 sensor
> wiring harness). The upshot is that the engine was running rich for maybe 4
> months. Is this enough to do in the cat-con? How much does it cost to get the
> cat-con replaced?
> -Bill (remove "botizer" to reply via email)

Re: '91' XJ: 02 sensor, rich mixture and cat-con
 

Thanks for responding Mike. I'm thinking it was pure coincidence now that the
Check Engine light went out when I tightened down the gas cap. The thing is,
the Check Engine light only came on intermittently. My gas mileage did drop
dramatically. I didn't see any black smoke though or smell any rotten egg
smells. I already R&R'ed the O2 sensor (and used some zip ties to tie it clear
of the prop shaft and header). I guess I'll have to wait for my smog test in
November.


The white wire was the one that was broken in the O2 sensor wiring harness.
BTW.

>I don't know for sure, but if that broken wire was going to really
>affect the running of the O2 sensor, it would have set off the check
>engine light permanently and set a code like disconnecting it will do.
>
>I think you mentioned you had a check engine light once that was fixed
>by tightening the loose gas cap, so that O2 wire isn't that old issue.
>
>Has your mileage gone lower?
>
>Does it kick out lots of black smoke when you goose it?
>
>Do you smell the rotten egg smell of a cat with too much gas in it?
>
>If not, I would just fix the wire and see what happens.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>


-Bill (remove "botizer" to reply via email)

Re: '91' XJ: 02 sensor, rich mixture and cat-con
 

Thanks for responding Mike. I'm thinking it was pure coincidence now that the
Check Engine light went out when I tightened down the gas cap. The thing is,
the Check Engine light only came on intermittently. My gas mileage did drop
dramatically. I didn't see any black smoke though or smell any rotten egg
smells. I already R&R'ed the O2 sensor (and used some zip ties to tie it clear
of the prop shaft and header). I guess I'll have to wait for my smog test in
November.


The white wire was the one that was broken in the O2 sensor wiring harness.
BTW.

>I don't know for sure, but if that broken wire was going to really
>affect the running of the O2 sensor, it would have set off the check
>engine light permanently and set a code like disconnecting it will do.
>
>I think you mentioned you had a check engine light once that was fixed
>by tightening the loose gas cap, so that O2 wire isn't that old issue.
>
>Has your mileage gone lower?
>
>Does it kick out lots of black smoke when you goose it?
>
>Do you smell the rotten egg smell of a cat with too much gas in it?
>
>If not, I would just fix the wire and see what happens.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>


-Bill (remove "botizer" to reply via email)

Re: '91' XJ: 02 sensor, rich mixture and cat-con
 

Thanks for responding Mike. I'm thinking it was pure coincidence now that the
Check Engine light went out when I tightened down the gas cap. The thing is,
the Check Engine light only came on intermittently. My gas mileage did drop
dramatically. I didn't see any black smoke though or smell any rotten egg
smells. I already R&R'ed the O2 sensor (and used some zip ties to tie it clear
of the prop shaft and header). I guess I'll have to wait for my smog test in
November.


The white wire was the one that was broken in the O2 sensor wiring harness.
BTW.

>I don't know for sure, but if that broken wire was going to really
>affect the running of the O2 sensor, it would have set off the check
>engine light permanently and set a code like disconnecting it will do.
>
>I think you mentioned you had a check engine light once that was fixed
>by tightening the loose gas cap, so that O2 wire isn't that old issue.
>
>Has your mileage gone lower?
>
>Does it kick out lots of black smoke when you goose it?
>
>Do you smell the rotten egg smell of a cat with too much gas in it?
>
>If not, I would just fix the wire and see what happens.
>
>Mike
>86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>88 Cherokee 235 BFG AT's
>


-Bill (remove "botizer" to reply via email)