Any straight-pipers in CO on here?
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Diesel Fan
Joined: Aug 2010
Posts: 14
Likes: 0
From: Spokane, WA
Any straight-pipers in CO on here?
If so, where do you live and is the diesel emissions requirement an issue? I have no cat on my 05 cummins and am a little worried about registering in the Denver area. Any help would be appreciated.
Diesel Bomber
Joined: Aug 2009
Posts: 2,257
Likes: 186
From: CO
You will surely get bagged for that in Denver, or anywhere nearby. There are very few places left on the front range not doing emissions testing. I'm presently planning a project to reinstall a cat on the '06 due to recent changes in my area's rules. 
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Diesel Fan
Joined: Aug 2010
Posts: 14
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From: Spokane, WA
hmmm
so are you saying they physically look for the cat or that you feel it will fail w/o one? How does that work with the previous years that didn't have them I wonder? I kept my old exhaust, so I still have the cat and will have it clamped back on if I have too. I was hoping it was just a tailpipe measurement and that I might pass just fine.
Banned
Joined: May 2008
Posts: 310
Likes: 10
From: Denver, CO
CO only checks opacity. There is no visual inspection and most stations don't even open the hood. Ignore NadirPoint, he doesn't have the slightest clue what hes talking about.
Use Diesels Only on Alameda and you're pretty much guaranteed to pass unless your engine pukes a cloud that fills the shop.
Use Diesels Only on Alameda and you're pretty much guaranteed to pass unless your engine pukes a cloud that fills the shop.
Diesel Bomber
Joined: Aug 2009
Posts: 2,257
Likes: 186
From: CO
Once again FI demonstrates his extensive knowledge of all things diesel. The CO requirements are in a nutshell:
I suppose if you can find a testing station that doesn't follow the rules, more power to ya!
You can get an SAE tech paper with all the details here: http://papers.sae.org/900329
Counties: Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, and Jefferson
Vehicles Tested: All model years with a 14,000-pound GVWR or less (new vehicles are exempt for first four years)
Test Type(s): Visual inspection for emissions-equipment tampering, onboard diagnostics (OBD-II) check (if applicable), and a smoke opacity test
Recently some areas of Weld and other non-enhanced category areas were included for diesel inspection.Vehicles Tested: All model years with a 14,000-pound GVWR or less (new vehicles are exempt for first four years)
Test Type(s): Visual inspection for emissions-equipment tampering, onboard diagnostics (OBD-II) check (if applicable), and a smoke opacity test
I suppose if you can find a testing station that doesn't follow the rules, more power to ya!
You can get an SAE tech paper with all the details here: http://papers.sae.org/900329
Last edited by NadirPoint; Sep 1, 2010 at 08:36 AM.
Thread Starter
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Diesel Fan
Joined: Aug 2010
Posts: 14
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From: Spokane, WA
so I will be in Arapahoe county. Maybe I will give that shop a call or another shop a call before I go in. If I need the cat to be re-installed, I have to cut it off the factory pipe and have it welded to my aftermarket exhaust. Thx guys.
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Diesel Fan
Joined: Aug 2010
Posts: 14
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From: Spokane, WA
**UPDATE**
So I called a few shops in CO and they definitely *DO* visual inspection for cat. I had mine welded back on today just to be safe and now my truck sounds normal again 
Guess I will have to remove the muffler again and see how she sounds. If I find out different when I arrive, I will update this thread. Thanks for the input.
-R
Guess I will have to remove the muffler again and see how she sounds. If I find out different when I arrive, I will update this thread. Thanks for the input.-R
Banned
Joined: May 2008
Posts: 310
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From: Denver, CO
I had mine welded back on today just to be safe
