My rear 02 sensor has a bad spot in it, or is on its last legs. Throws the cel from time to time, but it never affects performance.

 

As others have stated, you're incorrect. The PCM takes readings for the A/F ratio only from the front (upstream or pre-cat) O2 sensor. The only purpose of the 2nd (downstream or post-cat) O2 sensor is for emissions (catalytic converter efficiency).

 

Well got up this morning and went and got a 3 foot pipe.

I cut the exhuast off about 2 feet or so from the cat and took out both o2 sensors.

I then put the pipe in and hit it with a hammer til i got through the honeycomb insides.

Did this as much as i could until i couldnt reach anymore honeycomb pieces.

I turned truck on and reved her up a few times and turned it off to break more out. did this like 3 times.

I drove the truck for a while to make sure all got out.

You were right. i love the sound. So i took a 2.5 inch angle pipe with a 90 degree angle in it that i had in the garage and i cut it down and i put it right on where i cut the exhust.

Sounds BAD TO THE BONE.

I put both o2 sensors back and get no CEL.

Im sure everyone will like me more now that the truck is louder and i leave Mon-Fri at 6:30 am

Thanks for all the help

 

Your CEL bulb is probably burned out.

 

yeah, could it be getting so much flow that it just doesnt read it good?

 

If he does that, he might get arrested for Zoophilia.