95 gmc obd1 code 13

[low4x4]

my 95 only has a purple and only one o2 sensor

 

[Bearcat91]

Just did my headers and y pipe a few weeks ago on my 95 with a 305...I had one o2 sensor with one wire. I left the o2 out and it throws the see after 10 or so minutes just like you said. Standing in front of the truck its in the driver side Mani right where the header meets the y pipe

 

[loom383]

I have a single Blue wire that runs under the booster down to the exhaust that has been cut and capped. my exhaust goes down and meets on the passenger side(where the 2 pipes y together) and the 02 sensor is right before the cat. Would that blue wire be for my 02 sensor?

 

[axisT6]

No, you have a 3 wire O2 given the location.

 

[loom383]

No, you have a 3 wire O2 given the location.

Do you know where the plug for that sensor runs to then?

 

[loom383]

Heres some pictures of my truck. Both manifolds have that kind plug in it.

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The other 3 pictures are of the passenger side where the two pipes from the manifolds meet. There is a plug there as well. Not sure if this is any help but I figured it couldn't hurt. Thanks again for any help!

 

[axisT6]

That bolt on the manifold is either for AIR injection or EGR. The spot on your exhaust system just ahead of your cat is where the O2 needs to go.

 

[X-Cutioner]

on my 95 5.7lt ecsb 4x4 its located below the passenger floor in front of the cat
this one has 3 wires (don't know the colors)

I do know that they did not use a self heated O2 sensor until 96 when the vortec and obd2 was put in our trucks

if you what it you can install the heated O2 sensor, you just need to put the 4 wire connector on your truck and run a switched ignition wire for the heater circuit. the only thing it will do is make the O2 start reading faster and get the engine running more efficient faster.

 

[loom383]

on my 95 5.7lt ecsb 4x4 its located below the passenger floor in front of the cat
this one has 3 wires (don't know the colors)

I do know that they did not use a self heated O2 sensor until 96 when the vortec and obd2 was put in our trucks

if you what it you can install the heated O2 sensor, you just need to put the 4 wire connector on your truck and run a switched ignition wire for the heater circuit. the only thing it will do is make the O2 start reading faster and get the engine running more efficient faster.

Ok thank you! Do you know where the 02 sensor plug runs? I am not sure if the guy before me cut it off or what but I can't find it anywhere!

 

[X-Cutioner]

id have to crawl under the truck and find out but right now we got sleet and snow starting up
as soon as I can I will find out