Passing Emissions w/Nutter Bypass - Off-Road Forums & Discussion Groups

YJOwnr22 · #1 02-24-2003, 11:56 PM

Is it a possibility? The visual inspection in Illinois isn't incredibly hardcore - I think I can get away with that - but do any of you guys have an experiences with this? I've wanted to do the bypass for a good long while, and I'm just now getting around to it - but I don't want to fail the sniffer portion of the test... Right now my YJ idles a bit rough, but my emissions are fine.. (i just had it on a 5-gas analyzer @ school the other day...)

So what's the verdict? How about an aftermarket carb? Emissions legal?

Thanks,
Pablo

YJOwnr22 · #2 02-25-2003, 11:39 AM

guys i know someone can help me! a bunch of you guys have nuttered 258's.. [img]images/graemlins/smile.gif[/img] Anyone?

beee240 · #3 02-25-2003, 11:48 AM

I'm worried about that too. I've put on a Weber 32/26 and have everything all set up to Nutter the ignition. I know that the Weber might go against me the most though.

#4 02-25-2003, 01:49 PM

In Colorado if the aftermarket carb has a C.A.R.B. exemption then, you could get away with it. If not you might have to find a carb from that year and hook it back up. That is what one of my friends does every year.

 Don't try this at home folks 
With the legal stuff out of the way:

He has the carb with the stepper motor wires go into a phony loom that the inspector thinks is hooked up. Twenty minutes later the Weber goes back on. I can't say to try it but, I've seen it work. L8r,

TheBigUgly [img]images/graemlins/scs.gif[/img]

LEVE · #5 02-25-2003, 02:26 PM

1. Remember one thing...
2. The Nutter Bypass will cause the engine
3. To run Richer...
4. It's going to be tough to lean the engine
5. Out enough to possibly pass the tailpipe sniffer,
6. Even if you get by the visual tests.
7. So, just a few words of warning...

sloop · #6 02-25-2003, 02:32 PM

<blockquote>In reply to:<hr />

Right now my YJ idles a bit rough, but my emissions are fine.. (i just had it on a 5-gas analyzer @ school the other day...)

[/ QUOTE ]

If you are sure your tailpipe emissions are fine then what are you worried about? As long as everything 'looks' similar to original whats the problem?

YJOwnr22 · #7 02-25-2003, 02:41 PM

Mark-

Maybe you were a little confused upon reading the post - i haven't done the nutter bypass yet. The YJ passes emissions w/flying colors w/the stock, computer controlled carb, hooked up to the ECM, etc. I'm worried about it failing miserably without it. In John Nutters writeup, he claims his emissions actually IMPROVED after he did it. I'm going to do the bypass @ school tonight and throw it on the 5-gas again to see what my readings are. I'll let you guys know how it goes later.