Guys! Just bought my first vette. 2006 C6. Has longtubes, high flow cats welded in, Corsa exhaust and a cold air. This is an Automatic car. I have ZERO experience with vettes. Mostly mustang stuff so I am familar with the SCT stuff and how tuners work. Problem is I have a MIL on because of the exhaust. The guy never had the car tuned in any way. Now I know that you can turn off the rear o2's for this reason but I also know if you do you wont pass an OBD code scan for a state emissions inspection. What is my answer here guys? MIL eliminators for the 02's?? I desperately need my tag!! Also, WHAT are you guys using to tune these things? Handheld tuners? I know its a noob question to throw in at the end but I dont care to discuss it in this thread too. Thanks guys! Happy to join!
Location: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Quote:
Originally Posted by nitrod86gt
Guys! Just bought my first vette. 2006 C6. Has longtubes, high flow cats welded in, Corsa exhaust and a cold air. This is an Automatic car. I have ZERO experience with vettes. Mostly mustang stuff so I am familar with the SCT stuff and how tuners work. Problem is I have a MIL on because of the exhaust. The guy never had the car tuned in any way. Now I know that you can turn off the rear o2's for this reason but I also know if you do you wont pass an OBD code scan for a state emissions inspection. What is my answer here guys? MIL eliminators for the 02's?? I desperately need my tag!! Also, WHAT are you guys using to tune these things? Handheld tuners? I know its a noob question to throw in at the end but I dont care to discuss it in this thread too. Thanks guys! Happy to join!
You should get a tune first.
With your mods, you should pass if tuned right. Many guys have headers, cam, exhaust, etc. pass after a tune. The emission tests in Texas plug into the OBDII port and look at MIL codes and at various self tests done by the PCM. If the PCM is clean, it passes.
When you get it tuned, tell the tuner you need to pass emissions and don't take the car back until it will. In HP Tuners, there is a screen that will list the completion status of the various self tests. There are ways to shut off emission status reports in the PCM to pass emission tests, but these are illegal. In any case, with your mods, this should not be necessary if the tuner knows his stuff.
Your profile is not filled out showing your location, we can not recommend an experienced tuner in your area.
Thats weird. I thought that I put I was from Chattanooga TN.? My state is a plug-in OBD check. In the mustang world with offroad pipes they turn off the rear o2's. The problem with is the O2 "flags" in the ECU never get tripped so they wont pass emissions. So youre saying there is a way to turn off the O2's and all the flags still show up and I will pass the test? I am desperate here guys!
Location: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Quote:
Originally Posted by nitrod86gt
Thats weird. I thought that I put I was from Chattanooga TN.? My state is a plug-in OBD check. In the mustang world with offroad pipes they turn off the rear o2's. The problem with is the O2 "flags" in the ECU never get tripped so they wont pass emissions. So youre saying there is a way to turn off the O2's and all the flags still show up and I will pass the test? I am desperate here guys!
If those are your only mods, and it relates to your mods, I am sure all you need is someone to tune it correctly. No need to disable the rear 02 sensors.
As I said earlier, its is illegal to do anything in the software just to fool the emissions test. I doubt a reputable tuner would do it and besides, you should not need to.
Do a search in this forum for vendors or tuners in your area and take the car there. It actual may not be something to your mods.
If you have the software, you just turn off the error reporting for the rear O2 codes. Chances are your car would benefit from a tune if it wasn't done when the headers were installed.
They did make O2 simulators that a lot of people used before tuning software became the norm. These sent a signal back to the PCM saying things wer a-ok so the light would not trigger. Maybe some of the bigger forum sponsors like LG, Texas Speed or Speedinc still have some lying around.
See I figured with the hi-flo cats that it SHOULDNT throw a code but Im sure they just flow too well. Seems like if I turned off the error reporting on the rear O2's it wouldnt trip the "flags" inside the PCM so it would pass the plug-in test?? I need to definitly find a tuner. Who's the best in the southeastern TN/northwest GA, NE alabama areas???
Location: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Quote:
Originally Posted by nitrod86gt
See I figured with the hi-flo cats that it SHOULDNT throw a code but Im sure they just flow too well. Seems like if I turned off the error reporting on the rear O2's it wouldnt trip the "flags" inside the PCM so it would pass the plug-in test?? I need to definitly find a tuner. Who's the best in the southeastern TN/northwest GA, NE alabama areas???
I have more mods than you and I pass the emissions test no problem. The difference is my has been tuned.
Get someone to read the codes to help determine why its throwing a code. But it still needs a tune, so just have it done. Don't worry about the rear O2 sensors. Mine are working.
Car is failing the SRT, system readiness test, if it cannot get by ALDL system scan from inspection station. Disconnecting battery in stock car will cause same problems.
Most likely 02 related issues. Anyoen familiar with tuning can clear these up and get you through emissions. You can hook up EFILive, as an example and see the results of your SRT test.
I forget how many parts are included in the SRT but most states will allow one or even two flags in the srt test and still pass the car.
Disabling MIL and DTC will get you through your state;s SRT and emissions test.
Location: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Quote:
Originally Posted by Chalky
Car is failing the SRT, system readiness test, if it cannot get by ALDL system scan from inspection station. Disconnecting battery in stock car will cause same problems.
Most likely 02 related issues. Anyoen familiar with tuning can clear these up and get you through emissions. You can hook up EFILive, as an example and see the results of your SRT test.
I forget how many parts are included in the SRT but most states will allow one or even two flags in the srt test and still pass the car.
Disabling MIL and DTC will get you through your state;s SRT and emissions test.
Find out which test it is failing. It is possible it is NOT 02 sensor related. You seem convinced this is your cause and it may not be. They should have have given you a paper copy saying which tests passed and did not pass. Have you taken it to a tuner yet??
I had a similar problem a couple of months ago. I had added a lot of ignition advance to the stock tune. I was failing because of 2 'not ready'. One was due to the evaporation system which takes a few driving cycles to complete the self test but because I had just flashed the PCM, it was not ready. The second was the cat test. I fixed this by reflashing the PCM back to the factory ignition advance tables. I had too much advance at idle.
Disabling the MIL or DTC is illegal and as I said earlier, it should not be necessary with the mods you have. I do not think the forum monitors will allow information being posted outlining how to do this. I know on the HP Forum, this is not permitted.
If you have long tubes, then simply tuning the car is not going to make the rear O2 codes stop happening, even if the car has cats. Long tubes typically don't put the cat at a temperature where it functions at it's best, so you have to disable the error reporting on the rear codes. That's the only way to do it. HP Tuners or EFI Live can take care of it really easy... Just find all codes related to Sensor 2 for each bank, and set them to 3 - No Error Reported.
So I had it scanned and its throwing code P0430. Isnt that rear O2's? If I turn off error reporting will it pass a plug emissions test? Will it allow the ECU to trip the right flags so I can?
So I had it scanned and its throwing code P0430. Isnt that rear O2's? If I turn off error reporting will it pass a plug emissions test? Will it allow the ECU to trip the right flags so I can?
That is right side after cat 02 sensors. You can turn off P0420/P0430 in DTC and MIL tables and these codes will not show up again. Problem you will have is that to disable these DTC and MILs, you will have to reflash the tune and then complete another driving cycle to complete SRT.
Your car can still fail the emission test even with no codes if SRT drive cycle has not been completed and still not have any cel codes.
Location: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Quote:
Originally Posted by Chalky
That is right side after cat 02 sensors. You can turn off P0420/P0430 in DTC and MIL tables and these codes will not show up again. Problem you will have is that to disable these DTC and MILs, you will have to reflash the tune and then complete another driving cycle to complete SRT.
Your car can still fail the emission test even with no codes if SRT drive cycle has not been completed and still not have any cel codes.
It says there are a number of causing other than the long tubes headers including bad cats, bad O2, leaky injectors, air leak after MAF, exhaust tube, etc...
If the 02 DTCs are switched to "no report" that will keep the light from coming back but as Chalky says, it won't necessarily get the SRT to "ready" and get a "pass" on the emissions test. I my case, although I had no codes, I had to back out some ignition advance to get the SRT to "ready".
Have you had someone in your area do a scan and look at the tune?? That could really help you find the source of the problem and get it fixed.
It says there are a number of causing other than the long tubes headers including bad cats, bad O2, leaky injectors, air leak after MAF, exhaust tube, etc...
If the 02 DTCs are switched to "no report" that will keep the light from coming back but as Chalky says, it won't necessarily get the SRT to "ready" and get a "pass" on the emissions test. I my case, although I had no codes, I had to back out some ignition advance to get the SRT to "ready".
Have you had someone in your area do a scan and look at the tune?? That could really help you find the source of the problem and get it fixed.
Well I don't know of any LS tuners in my area? (Chattanooga, TN., convient to Atlanta, Knoxville, Nashville,Birmingham, etc.) I would LOVE to go have the car tuned but can they just flash my ECU or would I have to buy HPtuners/EFILive and THEN pay for a tune? My goal here intially is to simply get my light turned off and be able to get my SRT test passed so I can get a tag!!
You do not need HPT or EFILive if you want someone else to do your tuning and get you through emissions. You just need to find someone capable getting you through emissions and SRT.
Vengeance Racing is in Atlanta. They are competent tuners from what I have heard. They can review your tune and get you ready for emissions as well.
Buy HPT or EFILive if you want learn to do your own tuning. If you had EFILive or HPT, you could also email your tune/calibration to someone who could probably get your problem resolved at no cost assuming they use same tuning software.
EFILive costs $799.00 new I believe and comes with two licenses allowing you to tune 2 cars. After that, each license is $99.00.
HPTuner is also an excellent program. I am just not sure of cost structure and licensing plans.
Simple answer, if you just want to get a tune and through emissions, visit Vengeance Racing in Atlanta. Probably cost $500 for tune/dyno time. If you plan to modify and do future tunes, you have two choices, keep going back to your tuner or learn to tune it yourself.
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Must pass emissions! Please help!
