catdaddy300 Posted December 23, 2009 Report Share Posted December 23, 2009 put headers on and i was wondering how many if any of the 4 o2 sensors should i have ???? i am thinking at least one right?????? thanks Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted December 23, 2009 Report Share Posted December 23, 2009 Both front 02 sensors(pre-cat) must still be installed and used, they help the PCM determine the A/F ratio. The rear 02s strictly monitor the catalytic converter's operating condition, and I recommend leaving them in also if you are still running cats..... Quote Link to comment Share on other sites More sharing options...
catdaddy300 Posted December 23, 2009 Author Report Share Posted December 23, 2009 no i aint going to be running any cats but thank you Quote Link to comment Share on other sites More sharing options...
jc06VMAX Posted December 23, 2009 Report Share Posted December 23, 2009 Both front 02 sensors(pre-cat) must still be installed and used, they help the PCM determine the A/F ratio. The rear 02s strictly monitor the catalytic converter's operating condition, and I recommend leaving them in also if you are still running cats..... i'm not running cats but i still have my rear o2 sensors in...they are just turned off. didn't feel like filling in the hole or redoing pipe for right now. make sure you are tuned for a cat delete...otherwise your truck won't be running the best because the rear o2s wont be reading a change, thus throwing a code. Quote Link to comment Share on other sites More sharing options...
sierra ss Posted December 27, 2009 Report Share Posted December 27, 2009 Can the O2's be installed running LT's with the factory O2 harness or is extensions needed? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted December 27, 2009 Report Share Posted December 27, 2009 Can the O2's be installed running LT's with the factory O2 harness or is extensions needed? I didn't need an extension with the Dynatech kit, although they include one(but it is for the rear 02's)....the wire for the driver's front 02 is a bit taught, but an extension wasn't needed..... Quote Link to comment Share on other sites More sharing options...
jc06VMAX Posted December 27, 2009 Report Share Posted December 27, 2009 Can the O2's be installed running LT's with the factory O2 harness or is extensions needed? i didn't need an extension either. it came with stuff to do the extensions when i got my pacesetters, but you don't need them. Quote Link to comment Share on other sites More sharing options...
sierra ss Posted December 28, 2009 Report Share Posted December 28, 2009 I didn't need an extension with the Dynatech kit, although they include one(but it is for the rear 02's)....the wire for the driver's front 02 is a bit taught, but an extension wasn't needed..... i didn't need an extension either. it came with stuff to do the extensions when i got my pacesetters, but you don't need them. Thanks guys. Quote Link to comment Share on other sites More sharing options...
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