96 1500 Upstream 02 Sensor Question/Confirmation
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Registered User
Joined: Apr 2023
Posts: 3
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From: Upstate NY
96 1500 Upstream 02 Sensor Question/Confirmation
Hey Everyone,
Finally ended up with another 2nd gen recently and boy was it not taken care of properly. Truck is a 96 1/2 ton 2wd with the 5.2 and around 160k. Was used as a farm truck for a bit and younger driver had it before that, so it got the full brunt rural teenager with a V8 truck thrown at it lol.
Details of concern:
Previous owner cut the cat out completely and "welded" in a Walker y-pipe collector assumedly because it was clogged plus in NY this year of vehicle is emissions exempt so why not delete it
Upstream 02 sensor is just cut out with a dangling wire harness over the transmission
Downstream 02 sensor is still in the pipe and hooked up
My main concern at the time is the Upstream 02 Sensor. Eventually a converter will make it's way back on the truck after fixing other issues, but for now should I just hook the Upstream 02 harness into the bung for the downstream so at least it's getting an A/F reading and leave the downstream unplugged entirely? I'm worried about drivability if I were to just leave the Upstream sensor unplugged for now, but if it doesn't make enough of a difference that I have some time to work out other kinks and then come back to the exhaust, then I am okay with that as well.
Finally ended up with another 2nd gen recently and boy was it not taken care of properly. Truck is a 96 1/2 ton 2wd with the 5.2 and around 160k. Was used as a farm truck for a bit and younger driver had it before that, so it got the full brunt rural teenager with a V8 truck thrown at it lol.
Details of concern:
Previous owner cut the cat out completely and "welded" in a Walker y-pipe collector assumedly because it was clogged plus in NY this year of vehicle is emissions exempt so why not delete it
Upstream 02 sensor is just cut out with a dangling wire harness over the transmission
Downstream 02 sensor is still in the pipe and hooked up
My main concern at the time is the Upstream 02 Sensor. Eventually a converter will make it's way back on the truck after fixing other issues, but for now should I just hook the Upstream 02 harness into the bung for the downstream so at least it's getting an A/F reading and leave the downstream unplugged entirely? I'm worried about drivability if I were to just leave the Upstream sensor unplugged for now, but if it doesn't make enough of a difference that I have some time to work out other kinks and then come back to the exhaust, then I am okay with that as well.
Record Breaker
Joined: Jan 2004
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From: United States
Personally I'd fit the upstream sensor -- that's the one that strives for stoich. Bungs are cheap online. I was gonna make one but not worth the time.
Unibit + bright blue light machine = done
Unibit + bright blue light machine = done
Thread Starter
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Registered User
Joined: Apr 2023
Posts: 3
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From: Upstate NY
Alright, so this at least validates my concerns. I have access to a factory Y-pipe with the cat still in it, so I will rig that all up and double check the cat isn't clogged once I get the intake manifold back on the truck. Fixing other people's modifications is obnoxious but should be worth it. I just have to keep reminding myself that the truck was 600 bucks and the frame is stupid clean for 20+ year old truck in NYS
Administrator
Joined: Apr 2010
Posts: 87,415
Likes: 4,214
From: Clayton MI
Alright, so this at least validates my concerns. I have access to a factory Y-pipe with the cat still in it, so I will rig that all up and double check the cat isn't clogged once I get the intake manifold back on the truck. Fixing other people's modifications is obnoxious but should be worth it. I just have to keep reminding myself that the truck was 600 bucks and the frame is stupid clean for 20+ year old truck in NYS
