ohsixgt1217

Would this have anything to do with severe popping when I let off the gas from a higher RPM? Such as 3,000 +?

This all just started happening after I got LT headers btw. But ran fine for a week then crapped out.

BlackBetty

Did you get retune after the headers? I've heard that the changed location of the O2 sensors can mess with the readings.

ohsixgt1217

no...had an o/r x pipe then got the headers.

Not sure what to change on the tune.... idk tho.

ChiDiddy

o2 sensors are VERY sensitive to shock and damage. so it could've been damaged during the install. also, running really rich hurt the o2 sensors as well, and any fuel additives. Do NOT switch up the primary and secondary sensors connector-wise. Bank 2 reads catalyst system efficiency. Although primary o2's are usually expensive, i think u would need to. You could also take it to the dealer and hope they replace it for you. If they deny, still doesnt void your warranty.

i am against the use of ANY fuel additives that u find at autozone or something. (EXCEPT Lucas Brand) Even though they advertise "o2 sensor safe", its not needed. Your gas station would have plenty of additives arleady.

ohsixgt1217

Thanks for the reply. Im not too worried about dishing out the $$ for the o2 sensors....i just want the damn things fixed, bad.

So i should buy both im assuming?

I was in fact running fairly rich for a while when I was tuning the nitrous. Sometimes would dip under 10.0 a/f.

I have no problems buying them if thats going to fix it...and i know you cant diagnose it through the internet, lol!

But the strange thing is for a week straight after the headers it ran great...then slowly got worse. First at start up...then it would warm up and be ok. Then it just started lasting longer and longer, now all the time. No matter how long its been running it runs like garbage.


If i took the two front o2 sensors off of another 05 + GT and put them on my car just to see if that was the problem would that be a good idea?

ChiDiddy

yes, that would be a good idea. You only need to replace Bank 1. Bank 2 does not have anything to deal with closed loop operation. Running really rich eh? That could be the source of the problem. Who knows, maybe your sensor could just need some cleaning.

First, try spraying WD-40, on it, wipe it down, then Autozone brake cleaner. (non-chlorinated version ONLY). My friend did this combo and it made his sensor work again. Dont use Brakleen brand or any other as it may be too strong.

Next, try with a friend's o2 sensor. If that does not work, stop. It could be something else. Report back.

ohsixgt1217

Thanks a ton man. I will try cleaning first, then switching with my buddy who has an 06 GT as well.

Just to be sure...I believe bank 1 is driver side correct?

Thanks again for all the help......God i hope it's this easy!