Hennytime

iTrader: (33)

ok guys, i finally got my wideband, and now have an install question. first, did you use the stock bung and just delete on of the front o2 sensors (before cats)--im still using the stock manifolds, but will be getting those ebay longtubes in a few weeks. did anyone weld a new bung in to use for the wideband sensor? any advantage/disadvantage to these methods? thanks in advance

ty_ty13

iTrader: (42)

do you have cats? if not put it in the bung thats right under the passenger seat... thats what i did...

Billiumss

iTrader: (11)

You can use a rear O2 bung but it will be off slightly, about .2 leaner.

foff667

iTrader: (2)

I always have a separate o2 bung welded in, but then again I only set up my wideband for temporary use.

Hennytime

iTrader: (33)

this is going to stay in the car untill it either dies or i sell it. i do have the whole factory exhaust, so yes i have cats, but im going to go long tubes and true duals dumped.

basically, are there any adverse effects from removing a front o2 sensor?

foff667

iTrader: (2)

the vehicle will go into open loop unless you program the wideband to simulate a narrowband which is usually not recommended for extended periods of time.

Xtnct00WS6

iTrader: (8)

Just curious why that's not recommended?

Thanks

foff667

iTrader: (2)

its simulated meaning not necessarily as good as an actual narrowband. It's only secondhand info though so take it FWIW

Hennytime

iTrader: (33)

ok, so can i une it out w/ hp tuners?

SSpdDmon

iTrader: (10)

Yes, you can tune out the stock O2 sensors with tuning software like EFI Live, HPTuners, LS1 Edit, etc. What you'll end up with is a EFI system that kind of operates like a carb'd system where it just sends the fuel and that's it. If it's off, there's no way of knowing because this state is called open loop (no fueling corrections made based on the stock O2 sensors). Therefore, you have complete control over how rich/lean the tune is. The up side is, it's not that hard to tune a car to run in open loop. It's very similar to tuning a car that doesn't. You just don't return it to closed loop. Also, you can command the AFR to richen progressively unlike closed loop where it's either at 14.63 or in PE. I noticed my '02 Z liked this a little better and I could run a little more spark and make a little more power at part throttle. The down side is, the weather and conditions in this world change. Yes, sensors like the MAF will help to compensate for those changes. But, they can't compensate for them 100%. So on any given day, your fueling could be off 2~3%. Plus, if you ever get stuck in traffic and your intake and coolant temps rise high enough while in open loop, your AFR's will lean out enough to push you from a 14:1 to a 17:1. I'm still trying to figure out how to keep that from happening. Other than that, I love my open loop tune and plan on keeping it that way since I usually check the tune every now and then. That's just my $0.02.

ringram

SSpd your answer is to use a custom OS in the case of EFI they have table A0014 to adjust for leaning out. You can get your open loop very close to exact most of the time.

Hennytime

iTrader: (33)

ehh, i think ill add another bung for it, i dont have hp tuners, just access to it, and he doesnt know how to tune much, just small stuff.