O2 problems
Thread Starter
Teching In
Joined: Nov 2003
Posts: 25
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From: Gretna, la
O2 problems Okay my pass 02 has been reading funny so i go to check it out and i can see it got burned on my headers. Not completly just burned the rubber off. Its in the area between the headers and fender well. So anyway i pull out the 02 harness from up top and i cut what is burned. I solder it back together and put some of that heat shrink stuff on it(lil rubber tubes). I know for a fact i did not get any wires mixed. I did them one by one. Now my 02 is only reading 003. Before this it read around .100 to 200millivolts. oh this is the wire comeing out the PCM. I also sprayed electrical cleaner from NAPA on the wires i cut and on the connectors. This is everything i did. Anyone have an idea of wat could be wrong? Did the wires that were burned touching each other short out the O2??
Thread Starter
Teching In
Joined: Nov 2003
Posts: 25
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From: Gretna, la
Originally Posted by LoudmouthLT1
Just buy a new O2 sensor and solve the problem.
On The Tree
Joined: Jan 2005
Posts: 103
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From: Cheyenne, WY
Originally Posted by Firehawk409
Okay thats not really helping much. How do i even know if its my 02 that has gone bad?? The 02 worked just fine till the wires coming out the pcm got burned.
Thread Starter
Teching In
Joined: Nov 2003
Posts: 25
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From: Gretna, la
Okay i see wat you all are saying. Thing is before anything major happened the 02 worked. Wires got burned i started getting weird numbers. Put wires together and now i get .003. I always thought if an 02 went bad it would show .445 or somewhere around that. Im jsut worried that maybe the wires are bad and i dont wanna buy a new 02 if thats not the problem. Ill just put the one that works on the pass side and go from there. Amongst all this i didnt even think about that till a friend of mine brought it up.
On The Tree
Joined: Jan 2005
Posts: 103
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From: Cheyenne, WY
Also, just FYI, O2 sensors do not show a set voltage. They fluctuate back and forth between .100 and .900 as the cat cycles lean and rich. If you have the car running and you are checking the voltage on the sensor and you are seing it stay at one value then it's probably screwed.
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Verdad Gallardo Thread Starter
Teching In
Joined: Nov 2003
Posts: 25
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From: Gretna, la
They got burned on my headers on the passenger side. The bundle of wires that come from the computer down the fender well right at the end it came apart and my 02 wires touched. I was lazy and didnt switch them around yet. I just unplugged them and made my way to the track on friday. Ran a 13.3@105, which was a best for me.
Ya i know the readings fluctuate, thats why i got worried when it stayed at .003. As soon as i become unlazy ill post up wat happened.
Ya i know the readings fluctuate, thats why i got worried when it stayed at .003. As soon as i become unlazy ill post up wat happened.
Thread Starter
Teching In
Joined: Nov 2003
Posts: 25
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From: Gretna, la
okay u know how they run down? it didnt burn up top. Its at the end where the wires split up. the wire loom frayed apart and got loosened up. So the 02 wire just got real hot from the header i guess. They didnt burn completly it just burned the rubber coating and the wires started touching. Could it be my motor mount is weak and leaning to close to the fender well? Is that even possible?