long tube o2 question

[2broke2gofast]

When installing long tubes, do you use the upstream or downstream O2 sensor in the header??? I've got a catless system.

 

[scarface]

upstream. the ones that normally are at the end of the stock manifolds. You will need to buy 02 extenders or lengthen the wires yourself.

 

[ryclef331]

upstream. the ones that normally are at the end of the stock manifolds. You will need to buy 02 extenders or lengthen the wires yourself.

I highly HIGHLY reccomend avoid cutting and splicing the o2 harnesses of any sort. a faultly or shoddy connection can cause a voltage drop across the wires. On a sensor that SENSES VARIENCES IN VOLTAGE, this can play hell. I reccomend either buying the extenders OR you can reroute the factory harness to reach the sensors new location. The harness for the tranny and o2's is its own harness and can be disconnected and rerouted with out the use of extenders. My harness is completely rerouted and tucked so I can't recall exactly where on a factory setup the connector would be but if you follow it forward, it can be easily located and rerouted. Keep it away from heat and you're good!

 

[scarface]

upstream. the ones that normally are at the end of the stock manifolds. You will need to buy 02 extenders or lengthen the wires yourself.

I highly HIGHLY reccomend avoid cutting and splicing the o2 harnesses of any sort. a faultly or shoddy connection can cause a voltage drop across the wires. On a sensor that SENSES VARIENCES IN VOLTAGE, this can play hell. I reccomend either buying the extenders OR you can reroute the factory harness to reach the sensors new location. The harness for the tranny and o2's is its own harness and can be disconnected and rerouted with out the use of extenders. My harness is completely rerouted and tucked so I can't recall exactly where on a factory setup the connector would be but if you follow it forward, it can be easily located and rerouted. Keep it away from heat and you're good!

well said.

 

[Downshift]

If you go to Autozone they carry Bosch o2s that have like 15 or 17 somewhere around that inches long for the wires. When you look it up on their computer it gives you like three different part numbers and the only difference is the wire being longer. I will measure it and get you the Part number tomorrow. I would think they would work. The wires are pretty long and seem like they would reach just fine.

 

[bany95]

Don't the 94-95's only have one pair of O2 sensors?

I know for a fact that my 95 only had one set (I pulled everything out for LT's and an H-Pipe).

 

[Downshift]

Don't the 94-95's only have one pair of O2 sensors?

I know for a fact that my 95 only had one set (I pulled everything out for LT's and an H-Pipe).

Yeah only two up before the cats.