Thread: Fooling rear O2

resonator isnt a restriction. leave it alone so the car stays quiet.

the ubend should be taken out, though.

you can buy an o2 simulator. those just plug into the plug where the o2 sensor would go. a resistor wont work.

Where would I find something like that and are they expensive?

They are about $40-$50 from ZZP

Thanks, I just checked their website, $60 Canadian before shipping. Yikes. I'll pass on that, it's a lot cheaper to just drill a hole and weld a bung into a $5 piece of pipe and reinstall the sensor

^^ Yeah...that works too Just be sure to get rid of that U-Bend though...horrible piece of GM engineering...plus it'll give ya a little bit better gas mileage too IMO.

Originally Posted by bluegtp91

^^ Yeah...that works too Just be sure to get rid of that U-Bend though...horrible piece of GM engineering...plus it'll give ya a little bit better gas mileage too IMO.

X2...huge difference

Cool thanks, now that I think of it I probably have some leftover exhaust pipe that I could use for that lying around, so if I just cut out the existing bung and reuse it this mod will cost me a whopping few cents in welding wire haha. Between that and having a motor with half the mileage of the one that kicked the bucket, I really hope my sis notices an improvement in power and economy

Just getting rid of the u-bend doesn't do a whole lot. The front manifold and the down pipe are still horrible restrictions.

Originally Posted by Sabrewings

Just getting rid of the u-bend doesn't do a whole lot. The front manifold and the down pipe are still horrible restrictions.

Better than having it.

Originally Posted by bluegtp91

Better than having it.

True. Just saying to not expect a seat of the pants difference.

Originally Posted by Sabrewings

True. Just saying to not expect a seat of the pants difference.

O for sure to be honest I didn notice really any power change when I swapped it, it was mainly the MPG....I went up 1.5 MPG

Originally Posted by gtpsleeper

O for sure to be honest I didn notice really any power change when I swapped it, it was mainly the MPG....I went up 1.5 MPG

I LOST mpg's. I installed my custom CAI when I did the U-Bend too...soooo...all those WOT runs

Originally Posted by oldschoolpontiacs

I've heard of guys putting resistors and such in to fool the computer into thinking it's reading what it wants to see, and since it still has the primary O2 upstream I can't see it causing any problems. Help?

i can tell you from personal experience, that this trick does not work to well i have changed the resistor about 4 times already they just keep blowing, so now i just drive with the SES light on until i get you o2 eliminator

Dammit! The O2 sensor had been cross threaded (was a huge PITA to remove) but I decided to try and fix up the threads and reuse it to save some $$$. I got the pipe all built up, O2 bung reused from the old pipe welded in the right place, threaded the new O2 in for a test fit under the car and after it wouldn't come back out. Threaded in nicely...but wouldn't come out...long story short, neither the sensor nor the bung have threads anymore. A new sensor is about $90, so she's going with the ZZP emulator. F$%K!!!!

Originally Posted by oldschoolpontiacs

Dammit! The O2 sensor had been cross threaded (was a huge PITA to remove) but I decided to try and fix up the threads and reuse it to save some $$$. I got the pipe all built up, O2 bung reused from the old pipe welded in the right place, threaded the new O2 in for a test fit under the car and after it wouldn't come back out. Threaded in nicely...but wouldn't come out...long story short, neither the sensor nor the bung have threads anymore. A new sensor is about $90, so she's going with the ZZP emulator. F$%K!!!!

Just wondering where in the hell you buy sensors FROM?!?! ZZP sells them for about 40-50 bucks.

Canada...we get raped on everything. ZZP sells the emulator for $50 too, but that's $60+ in our money, and then another $30-40 by the time it hits our door. Same for the O2. Folks in the US don't realize how dry we take it up here, even when our dollars were the same we were still paying more for everything just because companies get away with doing so. It's really irritating.

Originally Posted by oldschoolpontiacs

Canada...we get raped on everything. ZZP sells the emulator for $50 too, but that's $60+ in our money, and then another $30-40 by the time it hits our door. Same for the O2. Folks in the US don't realize how dry we take it up here, even when our dollars were the same we were still paying more for everything just because companies get away with doing so. It's really irritating.

yea that really sucks for you canadians. hard to get parts