For those w B&B EXHAUST....

[BigAndyZV]

After reading the bulletin about GM voiding the powertrain warranty for aftermarket tunes I am trying to make a deciison and would like your input. I have B&B X pipe, and B&B headers, no cats, obviously.

I have 2 choices:
1. I believe B&B can actually sell you high flow cats as add ons? Does anyone have these and if so does it still make your CEL (emission) light up? Or do the cats prevent the warning signal from coming on? If so I will probably go that route, no tune, and get my state inspection (TX) cleared that way.

2. otherwise my only option would be to get a tune to turn off the CEL light, and then pass isnpection that way, but of course voiding the powertrain warranty (possibly) when they catch it.

Your input is appreciated. Thanks guys!

[CTSV_Rob]

I have the high flow cats on mine and it still threw codes. I disabled it in my tune but you do have another option. They sell O2 simulators so you can "fool" the computer into thinking the cats are OK.

O2 extender, Not sure if this works but maybe (link):
http://www.inlinefour.com/blcelelad.html

O2 simulator (link):
http://www.o2simulator.com/index.php...4fd22a6c0347ca

[heavymetals]

Have the cats on mine with the resonator.

Had the rear 02's turned off.

Had Stealth tune it.

As far as voiding the warranty, if I was that concerned about it I wouldn't have modded the car.

[urbanski]

even with BB hi flo cats my CEL never came on....removing them necessitated a tune w/ the rears off. hopefully you can pass the sniffer then remove them again

[RGRATTAN]

It depends on how sensitive your stock O2's are, they are voltage driven IE they output a voltage signal to your ECM. What you can do is the same thing the Mustang crowd does and install some sort of voltage reducer inline before the ECU on the rear O2's ex: http://www.brothersperformance.com/c...oducts_id/1310 these worked well on the stangs with OBD2 I am almost sure that they would work on a GM platform as well.

Does anyone know what voltage the ECU sees on these sensors? I would think that it's is the same as stangs which is 0-5 Volts. All the inline connectors do on the above link is cut voltage since the ECU won't throw a code unless it sees a relatively high voltage.

Hope that helps....

[GMBOUND]

Originally Posted by BigAndyZV

After reading the bulletin about GM voiding the powertrain warranty for aftermarket tunes I am trying to make a deciison and would like your input. I have B&B X pipe, and B&B headers, no cats, obviously.

I have 2 choices:
1. I believe B&B can actually sell you high flow cats as add ons? Does anyone have these and if so does it still make your CEL (emission) light up? Or do the cats prevent the warning signal from coming on? If so I will probably go that route, no tune, and get my state inspection (TX) cleared that way.

2. otherwise my only option would be to get a tune to turn off the CEL light, and then pass isnpection that way, but of course voiding the powertrain warranty (possibly) when they catch it.

Your input is appreciated. Thanks guys!

This is what you do....
Immediately remove the B&B headers, set them aside, I'll make a trip down to Texas and remove them for free.
Being the caring forum member that I am, I would hate to see you loose your warranty I'm obliged to take them off your hands at no fee to you

[bossplayer]

Originally Posted by GMBOUND

This is what you do....
Immediately remove the B&B headers, set them aside, I'll make a trip down to Texas and remove them for free.
Being the caring forum member that I am, I would hate to see you loose your warranty I'm obliged to take them off your hands at no fee to you

Feeling frisky tonight, aren't we GM?

[GMBOUND]

Originally Posted by bossplayer

Feeling frisky tonight, aren't we GM?

Of course, I was getting very excited as I clicked on this thread. I just knew he was going to selling a pair of B&B Headers This was a big let down.
These used unmodified B&B headers are hard to come by. Still waiting on CTSV-Rob

[CTSV_Rob]

Your going to need to pry them from my cold dead fingers.

[BigAndyZV]

Thanks for all the help fellas!! I will probably just say F&*K it and get the tune! And pray to god nothing huge snaps lol. I love the b&B exhaust and headers! LOVE IT!

[v10boost]

Hey guys,

I have almost brand new B&B sports cat back for sale. It is ready to bolt up to kooks headers. It is in classifieds but asking 750+shipping.

[RGRATTAN]

Andy, don't tune the thing man at least I wouldn't...
Doesn't some one have a shop manual with a wiring diagram?
Go to radio shack or some equivalent and get a resistor to cut the voltage by 1/2 or 1/4 then worst case just splice it in-line with the two rear O2 signal wires. It can't hurt to try and it really should only be an hour worth of work.
If some one can get a shop manual of some sort and tell us what wire is the signal wire for the rear O2's that will expedite the process. Or turn the KEY ON IGNITION OFF and get a multi-meter ground it on the frame and look for the wire with a signal I know a Mustang will show about 1 volt with K-ON-IG_oFF.

I know I'm beating this to death but this is a problem that I’ve seen 100 times on Stangs... Oh and sorry i keep mentioning the S word.

[AlmostAV]

he still wont be running the proper a/f ratio.....

[Vee]

Originally Posted by CTSV_Rob

I have the high flow cats on mine and it still threw codes. I disabled it in my tune but you do have another option. They sell O2 simulators so you can "fool" the computer into thinking the cats are OK.

O2 extender, Not sure if this works but maybe (link):
http://www.inlinefour.com/blcelelad.html

O2 simulator (link):
http://www.o2simulator.com/index.php...4fd22a6c0347ca

Careful of those 02 simulators...Someone in the Buick Grand National community got in trouble with the feds for those...

http://thechromepony.com/News-07-10-07.html

[CTSV_Rob]

Jail time without the possibilty of parol?
Death row?

If your smart about it how will the Fed's find out?