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Old 10-03-2009, 11:09 AM   #1
Sparconx88
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Member#: 161756
Join Date: Oct 2007
Chapter/Region: RMIC
Location: Denver
Vehicle:
05 Wrx
Black

Default Will I pass emissions?

So I have a stage 2 wrx, it has a catless up pipe, catless turboback exhaust, short ram intake, and open source tune. I just received a notice in the mail that says I need to get my 2010 registration and in order to do that I have to take an emissions test. The only stock part of the exhaust I have is the catback. First off, if I can find somebody to let me borrow their stock catted DP and I put that on along with the stock catback will I be able to pass? Also, if I put on the stock turboback exhaust, will it screw up anything with the open source tune? I would rather just put the stock downpipe back on and leave the 3 inch catback just so its less work. My main concern is blowing up my motor because I went from a tuned 3inch catless downpipe to a 2.5 inch catted down pipe from the factory. I live in Littleton Colorado BTW and the altitude here is roughly 6,000ft.
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Old 10-03-2009, 12:32 PM   #2
magicstop
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Member#: 206853
Join Date: Mar 2009
Chapter/Region: RMIC
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2004 WRX Wagon
TXS Stage 4

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Depends on what they do for Colorado emissions. If it's just OBD-II and visual, you should be fine. If they smog test it, you'll have some trouble. But if they're just running the OBD, then your engine management from the tune should have cleared all the codes.
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Old 10-03-2009, 01:40 PM   #3
Fast03Wagon
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Join Date: Mar 2007
Chapter/Region: BAIC
Location: San Rafael, CA
Vehicle:
2003 WRX Wagon
Midnight Blue

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colorado is really pretty strict; they actually put it up on dyno type rollers and measure CO2, NOx and SOx, as well as unburned hydrocarbons. there is no way to pass without putting that stock downpipe on.
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Old 10-03-2009, 05:41 PM   #4
Fierysun
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Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
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2005 Subaru STI
2003 WRX Wagon

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You should have the original stock map. Just reload it and put the stock catted dp and exhaust back on. You may get an error code/check engine light without the catted up-pipe on the stock map. You can disable the codes with open source.
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Old 10-03-2009, 06:25 PM   #5
Thug Nasty
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Chapter/Region: HIIC
Location: Oahu, HI
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2002 WRX - Hybrid
PSM

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Quote:
Originally Posted by Fast03Wagon View Post
colorado is really pretty strict; they actually put it up on dyno type rollers and measure CO2, NOx and SOx, as well as unburned hydrocarbons. there is no way to pass without putting that stock downpipe on.
Maybe I just got lucky, I passed completely catless when I lived in Denver. I didn't have any CELs.
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