1979 dodge mobile traveler 360cl wont pass emissions

Very doubtful with today's emission standards if you put everything new on that motor it will pass.But if you want to put money into it a new carb and catalytic converter and new exhaust system will help

Wow.. a vehicle that old still has to pass emissions? I wonder how all those old stinky-ass pickups I get behind are allowed on the road. And those jackasses who blow black smoke, on purpose.

Per California DMV at https://www.dmv.ca.gov/portal/dmv/detail/vr/smogfaq

"Currently, smog inspections are required for all vehicles EXCEPT diesel powered vehicles 1997 year model and older or with a Gross Vehicle Weight (GVWR) of more than 14,000 lbs, electric, natural gas powered vehicles over 14,000 lbs, motorcycles, trailers, or gasoline powered vehicles 1975 and older."

when we had emissions testing here on my camper van i had to adjust my idle mixture screws on the carburetor in until the engine just started to stumble at idle a bit to get it to pass. there was a one year exemption issued if it would not pass after several tries to give you time to get it fixed.

Common problem with 360 is the exhaust cross over passage in the intake manifold. Ackward job to clean without taking manifold off.
Odd that the vehicle needs emission testing!

1984 was the first year for mandatory use of converters, prior to that it was optional but if the vehicle came with one it is required. Test on vehicles are a little schety to beging with.

A cat actually makes C02.

Check and see if you can get a vintage vehicle exemption at that age you just might.

No exemptions for commercial vehicles.

DATA allows perspective. List HC, CO, and NOX data. it will have max/min + your numbers listed. One such example a VACUUM LEAK will raise CO numbers. Can we see some numbers, please?

CO is the air/fuel mixture. Need a good carburetor adjustment or better just get a new one.

The OP said CO2 not CO. Emission tests require CO2 OVER a certain level, not less.

Just passed California smog test with a 318.

@25mph and 1415rpm
%co2 13.3
%O2 2.5
Hc 83ppm---max allowable 102
CO% 0.09-----------------0.64
NO 118------------------870