O2 Sensor wiring - still ok?
Thread Starter
Staging Lane
Joined: Jul 2004
Posts: 72
Likes: 0
From: The Motor City
O2 Sensor wiring - still ok? The harness (the part that comes from the PCM to the O2 sensor) touched the header and the casing and some of the electrical tape it was wrapped in was melted. The 4 wires inside were fine, so I rewrapped them and put new tubing.
I'm curently chasing down a high fuel trim on that side (bank 2). Would that be a possible cause of the high fuel trim? It is only high at idle and the rest of the time it is pretty much spot on. I don't know enough about 02 sensors to know if that would cause that to happen.
Thanks, guys!
I'm curently chasing down a high fuel trim on that side (bank 2). Would that be a possible cause of the high fuel trim? It is only high at idle and the rest of the time it is pretty much spot on. I don't know enough about 02 sensors to know if that would cause that to happen.
Thanks, guys!
TECH Regular
Joined: Jan 2015
Posts: 493
Likes: 2
The harness (the part that comes from the PCM to the O2 sensor) touched the header and the casing and some of the electrical tape it was wrapped in was melted. The 4 wires inside were fine, so I rewrapped them and put new tubing.
I'm curently chasing down a high fuel trim on that side (bank 2). Would that be a possible cause of the high fuel trim? It is only high at idle and the rest of the time it is pretty much spot on. I don't know enough about 02 sensors to know if that would cause that to happen.
Thanks, guys!
I'm curently chasing down a high fuel trim on that side (bank 2). Would that be a possible cause of the high fuel trim? It is only high at idle and the rest of the time it is pretty much spot on. I don't know enough about 02 sensors to know if that would cause that to happen.
Thanks, guys!
Thread Starter
Staging Lane
Joined: Jul 2004
Posts: 72
Likes: 0
From: The Motor City
The sensors are only about 500 miles old.
By 24" downstream, do you mean PAST the o2 sensors? The car only has the front sensors - the rears have been programmed out. There IS a leak down the exhaust probably 18" after that sensor. Can that really cause it to run lean (and therefore rich after fuel trim)?
By 24" downstream, do you mean PAST the o2 sensors? The car only has the front sensors - the rears have been programmed out. There IS a leak down the exhaust probably 18" after that sensor. Can that really cause it to run lean (and therefore rich after fuel trim)?
TECH Regular
Joined: Jan 2015
Posts: 493
Likes: 2
The sensors are only about 500 miles old.
By 24" downstream, do you mean PAST the o2 sensors? The car only has the front sensors - the rears have been programmed out. There IS a leak down the exhaust probably 18" after that sensor. Can that really cause it to run lean (and therefore rich after fuel trim)?
By 24" downstream, do you mean PAST the o2 sensors? The car only has the front sensors - the rears have been programmed out. There IS a leak down the exhaust probably 18" after that sensor. Can that really cause it to run lean (and therefore rich after fuel trim)?
