Missing an o2? Upsteam/Downstream?
12-18-2012, 09:27 AM
#1
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Year: 2001
Model: Cherokee
Engine: I-6 4.0 L
Missing an o2? Upsteam/Downstream?
Being around on this forum, I know the concept has been beat to death. Trust me, I know. But, not one thread on this specific issue. To begin, I had no O2 sensor after my cat. Not a big issue I realize, but just found it strange. Second, My o2's are SHOTTTTT. So, I went to Bennett Auto (FL auto parts store) and asked for O2's. From what I see, I only have 2 sensors... one before/after ( can't remember) the pre-cats on the manifold and one further down the down pipe. Well, the counter lady gave me the option of downstream/upstream. Does it really matter? Right now my Jeep does this 
lol.
lol.
12-18-2012, 09:34 AM
#2
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Year: 1999
Model: Cherokee
Engine: 4.0
Selecct an O2S with EXACT FIT features. Don't use Universal fit crap.
The upstream O2S has a longer pigtail than the downstream O2S. And the downstream O2S connector should have a screw-like plastic gizzy on it for attachment to the downstream O2S dog house.
If you have a choice use NTK Sensors (Original factory equipment).
The upstream O2S has a longer pigtail than the downstream O2S. And the downstream O2S connector should have a screw-like plastic gizzy on it for attachment to the downstream O2S dog house.
If you have a choice use NTK Sensors (Original factory equipment).
12-18-2012, 09:38 AM
#3
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Year: 2001
Model: Cherokee
Engine: I-6 4.0 L
Selecct an O2S with EXACT FIT features. Don't use Universal fit crap.
The upstream O2S has a longer pigtail than the downstream O2S. And the downstream O2S connector should have a screw-like plastic gizzy on it for attachment to the downstream O2S dog house.
If you have a choice use NTK Sensors (Original factory equipment).
The upstream O2S has a longer pigtail than the downstream O2S. And the downstream O2S connector should have a screw-like plastic gizzy on it for attachment to the downstream O2S dog house.
If you have a choice use NTK Sensors (Original factory equipment).
12-18-2012, 02:08 PM
#5
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Year: 2001
Model: Cherokee
Engine: 4.0
Assuming this is for the 2001 in your profile the part numbers for the NTK's which are OEM are 23151 and 23099. They run about $30-35 each.[/QUOTE]
Damn I wish I could buy parts where you are. I have to pick up the 23151 today and it is $51.75 at the local NAPA store!
Damn I wish I could buy parts where you are. I have to pick up the 23151 today and it is $51.75 at the local NAPA store!
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