Help

[Daluz]

yeah i know they all should, but the person before me changed out the stock headers and downpipe which relocated the o2 spot to right before the cat, but he blocked off the o2 slot will like some steel sheet, and then he might have cut the wire

[907mge]

I also have an aftermarket header with the o2 sensor in the same location which causes a CEL. Now I don't know if that is your problem but I am going to move the sensor on mine up so it is much closer to the stock location. It seems that just extending the wire can cause problems as well as the temp drop because of the lower location down the pipe.

[87hilux7mge]

if the o2 sensor is not close enough to the collector or too far down stream, it will not get hot enough and your car will not run properly.

an option would be to get a heated o2 sensor. then it gets to operating temp quicker. but ive also had them falsify readings when placed too far down the exhaust. the car ran fine, but poor mileage ensued.

[Daluz]

yeah true, but the car isnt running an 02 sensor at all which i think is my problem, it looks like he cut the wire on the wiring harness or i just cant find it, im prob going to try to but the oem headers and down pipe and just do custom pipe after the down pipe

[87hilux7mge]

id say thats definitely your problem.

[Daluz]

yeah it just sucks cause now i dont know where the damn connection is ive looked on numerous occasions

[87hilux7mge]

i believe theres a pinout on the TSRM, find what color the wire is on there and trace it from the ecu itself. it should come out the end of the harness after it loops all the way around the drivers side. i believe it clipped to the firewall originally. it may have been clipped off at the end so check around where the harness crosses over the cam gear housing.

if you find it, you can keep your header and drill a new hole where the collectors merge, then have a bung welded on for a decent price (or a buddy with a welder), then put a heated o2 sensor in. problem solved and you get to keep your header.