2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Running Premix=failed emissions?

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Old Jan 23, 2006 | 05:07 PM
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Mankdrake 2661's Avatar
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Question Running Premix=failed emissions?

Can you run premix and still pass emissions?
And also has anyone ever heard or been successful at puting extra air (via an airpump) in to the cats to pass emissions?
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Old Jan 23, 2006 | 05:30 PM
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1. Not likely, no.
2. Yes.
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Old Jan 23, 2006 | 06:50 PM
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i'm 90% sure Ddub had a write up on pumping air into the cat via the airpump
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Old Jan 23, 2006 | 06:57 PM
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From: Performance Improvements
its also commonly done with turbod na's .. check aaron cakes site
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Old Jan 23, 2006 | 07:28 PM
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I have passed emissions twice with premix at 1 oz per gallon, so I dont know who says you cant, but they are wrong.
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Old Jan 23, 2006 | 09:16 PM
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Originally Posted by J-Rat
I have passed emissions twice with premix at 1 oz per gallon, so I dont know who says you cant, but they are wrong.
Yep, premixing at 120:1 passes with flying colours. Its not an issue.
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Old Jan 23, 2006 | 09:17 PM
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Originally Posted by scathcart
Yep, premixing at 120:1 passes with flying colours. Its not an issue.
If anything, it should be better than stock since 2-stroke oil burns better than dirty motor oil.
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Old Jan 23, 2006 | 09:23 PM
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yeah if you remove/disable the stock omp it will pass, now if you have the OMP running and are premixing then u'd just better not premix till after the test.
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Old Jan 24, 2006 | 12:35 AM
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Actually, I passed emissions with a working OMP and 4oz of premix in the tank... I know its a low ratio but I still passed
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