Seeking Long Tube Emissions & Codes Knowledge

[14pilot]

Got a nice bonus and want to purchase long tubes. Read all the Long Tube threads. I am seeking knowledge about how tuning out codes works EXACTLY.

What are the exact tuning options?

• Turn off any offending emissions related codes thrown? Likely to fail emissions testing, but would prevent Check Engine Light?
• Can the range of the parameters that cause the code be changed, leaving the code active, but working within the new params? AND passing AZ emissions testing?
• Something else entirely?

Trying to accomplish a set-up with long tubes, offroad pipes on my otherwise bone stock engine. Stock exhaust cat-back, maybe add X-pipe cat-back later. I want no Check Engine issues and want to be able to pass AZ emissions too. I'm fine with running spark plug non-foulers on the offroad pipes and can weld up O2 bungs and install this myself. No phyiscal inspections here in AZ. All testing is just plugging into the ECM and reading the emissions related data.

The long tubes & offroad pipes should meet my performance and sound goals. As for Emissions, Arizona emissions apply to me, so I do not care about other states emissions laws. I want to be able to pass my local emissions.

Can anyone with direct experience with this help me to understand what the changes made to the tune are? The changes for passing emissions, NOT the changes to AFR and timing for performance.

Again, seeking only to learn what is changed in the tune for passing emissions? Sure would help me decide about pulling the trigger on an order for headers.

[SSyanide]

Best way to go is with high flow cats, at least you're somewhat legal there. By removing stock cats that are not defective, you (or the shop that does it) could face a steep fine if caught. It's just not worth the extra couple of HP from not having them at all....use o2 extensions and get a tune with the headers/high flow cats/x pipe/exhaust. Sound will be great and quite a bit more HP and TQ to boot. While the inspection may only consist of plugging into the OBD2 port, if you get pulled and checked visually, could be a bad thing .If you're still set on running without cats, just turn off the rear o2s in tuning.

[14pilot]

Originally Posted by SSyanide

...If you're still set on running without cats, just turn off the rear o2s in tuning.

Yes, set on running without cats. So is turning off the rear O2s detectable during the emissions testing? Seems like they could read that they have been turned off?

[SSyanide]

not a tuner , but have seen where they can be made to read "ok " or "pass" via tuning . Maybe someone with HPT or another tuning software can help in this dept. The OBD2 port is only gonna tell the reader what the programming says, it's not gonna electronically dig to find out if it's been tuned.

[14pilot]

Originally Posted by SSyanide

not a tuner , but have seen where they can be made to read "ok " or "pass" via tuning . Maybe someone with HPT or another tuning software can help in this dept. The OBD2 port is only gonna tell the reader what the programming says, it's not gonna electronically dig to find out if it's been tuned.

Agreed! I doubt the emission test can see a tune, but I think it could see that an emission related test for the Cats has been turned off? Not sure here.

Any tuners out there that can contribute? I'd like to buy some long tubes, but I want to know what I'm getting into first.

[BLK2SS]

Originally Posted by 14pilot

Agreed! I doubt the emission test can see a tune, but I think it could see that an emission related test for the Cats has been turned off? Not sure here.

Any tuners out there that can contribute? I'd like to buy some long tubes, but I want to know what I'm getting into first.

There are 3-4 checks/faults that you turn off in the tune for the rear O2 sensors. The emission check will not see this, it only checks to see if you are throwing any faults. Also, just because your check engine light is not on does not mean the computer isn't registering a fault code.

[SSyanide]

Bank 1 and 2 , sensor 2 on both, and heater resistance , bank 1 and 2, sensor 2 on both...right..?

[BLK2SS]

Originally Posted by SSyanide

Bank 1 and 2 , sensor 2 on both, and heater resistance , bank 1 and 2, sensor 2 on both...right..?

Bank 1 & 2 sensor 2 for the following: O2 control circuit, O2 heater resistance, O2 low voltage, O2 insufficient activity, and catalyst low efficiency. There are different settings for turning on the check engine light (turn the the light on after 1 or 2 faults detected). You need to set them to no error reported. You also need to disable the catalyst over temp protection, the catalyst test, and the post O2 test in the tune.

[SSyanide]

good info...there ya go, OP.

[14pilot]

Originally Posted by BLK2SS

Bank 1 & 2 sensor 2 for the following: O2 control circuit, O2 heater resistance, O2 low voltage, O2 insufficient activity, and catalyst low efficiency. There are different settings for turning on the check engine light (turn the the light on after 1 or 2 faults detected). You need to set them to no error reported. You also need to disable the catalyst over temp protection, the catalyst test, and the post O2 test in the tune.

Ok, thank you. With this level of detail, sounds like it's fairly easy to do this provided I buy some tuning software.

So that begs another question, what tuning software/product do you use for your 2010 camaro?

[BLK2SS]

Originally Posted by 14pilot

Ok, thank you. With this level of detail, sounds like it's fairly easy to do this provided I buy some tuning software.

So that begs another question, what tuning software/product do you use for your 2010 camaro?

I use HPTuners.