emissions

Hope everyone is doing well. So, I have a vacuum diagram for my 84 MC. I'm trying to confirm the routing. Per the picture, is the top port of the EFE/TVS valve/sensor mating via a t-connector to the "L" hose from the carb before they connect through the merged single line to the AIR management...

https://gbodyforum.com/threads/gm-ccc-service-videos.76761/ (The discussion tab should point to this thread. )

First build, never gone through the emissions process before. This is my first car lol. I have a 78 monte carlo with a 69-80 350, unknown cam, with a 600cfm carb. It has unknown longtubes, true dual, to glasspacks. Will i need cats for 78? I live in larimer county, and apparently i need to pass...

I need a Coloradan with a g body to give me some knowledge. The guy I bought the car from said that emmisions with these were weird, so I want to know the requirements to pass. Currently have a straight pipe with only glass packs on an sbc. Thanks -ethan

Wondering if anyone on this site can help me with information on gathering all the smog hoses and decals for passing California Smog. There are several decals, and i need to buy the correct one. This is where i am starting. I also put in a new 305ci motor, and i need to buy all the hoses, ect...

Just curious how many of you still run catalytic converters on your G-bodies. For those of you outside California and other states with strict smog laws, it's probably an easy decision, but for those of us living in Peoples' Republics, it's "living dangerously" to go cat-less. Also, what engines...

Hey everyone, got a 79 Monte, I'm thinking of ordering a new duel exhaust and headers kit from jegs. It's a bolt on deal set up. My only issue is I live in an emissions city and my car has a cat on it. The kit has no cats and not finding one that comes with them. I don't really want them anyway...