Failed Emissions test again. Help please.
Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
Thanks for letting us know how it all worked out, and glad it was good.
Just remember, some of us naysayers are just trying to provide accurate information based on the judgement of someone we don't know, never met and have no idea what kind of mechanical comprehension they have. After you've been on forums for a decade or two, and try to help diagnose a truck through a keyboard and monitor, you kind of go to the lowest common denominator approach.
Not to sound mean but back when I did emissions testing, none of the phonied up underhood stuff would have passed and just having a non stock carb and intake would have got you bounced out of my garage. It would have went to the city operated referee facility.
Just remember, some of us naysayers are just trying to provide accurate information based on the judgement of someone we don't know, never met and have no idea what kind of mechanical comprehension they have. After you've been on forums for a decade or two, and try to help diagnose a truck through a keyboard and monitor, you kind of go to the lowest common denominator approach.
Not to sound mean but back when I did emissions testing, none of the phonied up underhood stuff would have passed and just having a non stock carb and intake would have got you bounced out of my garage. It would have went to the city operated referee facility.
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New User
Joined: Oct 2017
Posts: 21
Likes: 0
Thanks. To be honest, it runs ok for having this calibration in it for emissions. I will need to re-tune it more for performance for what I want to use it for.
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New User
Joined: Oct 2017
Posts: 21
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To get it to pass I had to change it at idle and at what they consider cruise (2500rpm). To get the cruise dailed in I had to change jets, rods and disconnect the secondaries. Idle was just adjusted by the mixture screws. Once I get the new plates on it, I will then tune it for each of those stages you mentioned.
Elder User
Joined: Jun 2005
Posts: 542
Likes: 1
So, just out of curiosity, what did you end up with for rods and jets? That's pretty awesome, BTW, while I didn't doubt you could get there without the "system" , I really didn't know if you could get there with that carb.
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Post Fiend
Joined: Jun 2003
Posts: 8,209
Likes: 12
From: Black Hills of SD
To get it to pass I had to change it at idle and at what they consider cruise (2500rpm). To get the cruise dailed in I had to change jets, rods and disconnect the secondaries. Idle was just adjusted by the mixture screws. Once I get the new plates on it, I will then tune it for each of those stages you mentioned.
That was one reason Anchorage was so **** about all the original stuff being there and operational. They figured if all the emissions equipment was working, that was the most important. All the tailpipe test was for was to make sure raw gas wasn't running out the tailpipe.
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New User
Joined: Oct 2017
Posts: 21
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Isn't it just pointless and silly they do the 2500 and call it cruise speed. With no load on the engine, that rpm has nothing to do with what the engine is doing at cruise. So they basically have the owner tuning his engine all out of whack for any real world situation
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