Cobb stage 2 and smog - i-Club


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Old 05-09-2018, 06:45 PM   #1  
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Cobb stage 2 and smog

im planning to get a cobb downpipe and a custom protune and was wondering if the car will pass the obd2 readiness portion of the test. I am not concerned with the visual.
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Old 05-10-2018, 05:48 AM   #2  
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My 2004 STi has a COBB turboback and Stage 2 programming from 13 years ago plus Subaru's CARB-legal intake. It recently passed smog with no problems.
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Old 05-10-2018, 07:24 AM   #3  
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Originally Posted by walt View Post
My 2004 STi has a COBB turboback and Stage 2 programming from 13 years ago plus Subaru's CARB-legal intake. It recently passed smog with no problems.
thanks! With the 04, did they make you run the sniffer test? Or was it only the obd2 readiness portion?
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Old 05-10-2018, 09:43 AM   #4  
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Just the OBD plug-in. And to my surprise,the Accessport tuning didn't affect the readiness of any monitors.
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Old 05-10-2018, 09:51 AM   #5  
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Just the OBD plug-in. And to my surprise,the Accessport tuning didn't affect the readiness of any monitors.
Very interesting! Sorry -- going to bug you with a few more questions.

Which tune are you running?
I've been reading some of the stage 2 tunes deletes the code for the secondary cat, which would cause you to fail.
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Old 05-10-2018, 10:09 AM   #6  
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I have the standard California 91-octane map except that I had COBB raise the idle speed to 900 (so I can let the clutch out from a stop with minimal slippage). I expected a monitor to show as not ready,but apparently the monitor is changed rather than disabled and the cat code (P0420 ?,I forget) isn't triggered.
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Old 05-10-2018, 10:35 AM   #7  
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Originally Posted by walt View Post
I have the standard California 91-octane map except that I had COBB raise the idle speed to 900 (so I can let the clutch out from a stop with minimal slippage). I expected a monitor to show as not ready,but apparently the monitor is changed rather than disabled and the cat code (P0420 ?,I forget) isn't triggered.
thanks!! Sounds like i can flash back to the stage 2 ots cobb cali tune when I need my smog. I was afraid Id have to swap all my stock parts back on.
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Old 05-16-2018, 12:36 PM   #8  
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OK a few things here..

1)the smog check does NOT read the map, they cant tell what map you have, or even if you have some warnings/sensors turned off. All they can read is if you have a code or not thrown, and that you have driven more than 50 miles since the last reset/battery change.

2)Visual is where they will get you, unles syou are smart enough to hide your downpipe with a stock heat shield.

3)Move to WA, we don't have ANY visual check up here. They don't give a rats *** what I have under the hood so long as I don't have a check engine light on, I am good to go.
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Old Yesterday, 12:30 PM   #9  
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OK a few things here..

1)the smog check does NOT read the map, they cant tell what map you have, or even if you have some warnings/sensors turned off. All they can read is if you have a code or not thrown, and that you have driven more than 50 miles since the last reset/battery change.

2)Visual is where they will get you, unles syou are smart enough to hide your downpipe with a stock heat shield.

3)Move to WA, we don't have ANY visual check up here. They don't give a rats *** what I have under the hood so long as I don't have a check engine light on, I am good to go.
Very helpful. Thanks!
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