rear o2's = long term fuel trim?

[LETHALxLS1]

lol did i really say bung hole?? and i guess i didn't realize what the whole bungholeio thing was about.. now i get lol

i work on computers.. building/repairing/selling them.. things like that

O really thats good to know. Now I know who to call when I have a computer problem! hahaha

[M-Ten]

haha yeah, I'm just about done with school.. it's a school in tampa, i'll be heading out there tomorrow to try and finish up.. probably have like a week left or so..

[35thAnniZ28]

rear o2s only verify if the cats are within parameters. if the front and rear o2 numbers are too close together, the PCM will add fuel to try and see if the front o2 numbers go up and the rears stay lower.

explains the soot i had coming up when i gutted the cats a while back

[hotrd3g]

Where can I get a program and how much to tune OBD2 on these LS1's. I have a 2001 4.8 liter LS Silverado and I hulled out my cats and now have a code for the rear o2s. Sounds good now but sometimes i think it lost power.

[0rion]

what are your plans for the truck? How far do you plan on tuning it? That would determine what works best for you and price.

[hotrd3g]

Well I just built the 4L60E tranny with the Zpac and the Beast sunshell, Corvette servos and flipped the acumulators. It hits pretty dang hard now, almost annoying. While I had the tranny out I hulled the converters. I know these LS1s just want to breath and figured it would help, but now I think it gets into limp mode sometimes because of the code for the O2 sensors. I plan on installing an STS turbo system with methanol injection. And maybe A small 125 shot of N.O.S.. I have a laptop mount built for the truck and am looking for a realtime program/ Emulator maybe to tune this setup. I have been trying to research the EFI live progaram. But cannot find many people that are running this program on LS1s, I know alot of people that are running this program on Duramax's. It is awesome and they are winning in the Truck pulls.

[Tracker9118]

Never heard that one B-4.

[LETHALxLS1]

HP tuners for ls1s is tits from what I have read.

[hotrd3g]

Anyone ever build one of these 4.8's.

[LETHALxLS1]

I wonder if they have a forum for those trucks? ---Just thinking you might get some better info there.