Failed Emissions Questions, Update 4/17 Passed

so were you able to get it to pass?





-justin

didn't make it home in time to take it today but i have tomorrow off so i will be going to get it tested as soon as i get up in the am... will post results

I gotta look at hoses and junk....I think thats causing my idling issue and I am fairly certain its causing my rich run mode.....my truck stinks...literally....it dumps THAT MUCH fuel....i wonder what my mileage will shoot up too....since I gained about 30 miles a tank so far with repairs.....got my best at 280/90 miles for a change....I was getting 225/40 before.....

Thanks tweaker...its helpful write up and could lead people to do some checking first before just throwing money at a problem....always good to have info.

I have a related question... will I pass without the EGR valve? I took all my emissions crap out for the weber and pacesetter. I am wondering if I will pass emissions in the future. I have the charcoal canister and catalytic converter in.

I have hear that it might have something to do with the catalytic converter not working well. Don't know just hear from a co-worker when i was worried about not passing emissions inspection as well.

so i took the truck today and passed emissions with way lower NOx levels..
-------------------25/25 test--------------------
------------Reading------Allowed-------Result
HC ppm-------39-------------223---------pass
CO% --------0.01------------2.79---------pass
NOx ppm----352-------------1471--------Pass
RPM---------2029------------3000--------max
CO+CO2%---13.3--------------6.0--------min

---------------------50/15 test-----------------
------------Reading------Allowed-------Result
HC ppm---------37-----------228---------Pass
CO%------------0.01---------2.06---------Pass
NOx ppm-------497---------1601---------Pass
RPM------------1813--------3000---------max
CO+CO2%------13.2----------6.0---------min

cleaning it out helped eh? Thats awesome buddy!

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pretty big difference when you have a part of the emissions that isn't functioning properly... thanks again jonathan for the help...

Good work guys! Will have to work with Rob & AJ to get this in the techy section. Good info for those with and without a Weber carb. Would be interesting to see some emission info from a Weber/egr truck and a Weber/no egr truck. Might be able to help with the second one.

Again, thank you Jonathan for your very knowledgeable contributions to this forum!!!