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I got the new vacuum hose. 5/32". It expanded over the 1/4" fitting on the carb. Smog device gone!

I was looking at my stock 2 barrel carb. It has the same fitting as the distributor 3/16". The aftermarket holley is bigger at 1/4". I guess that's why my vacuum hose is so expanded looking. You'd think they would have kept it the same at 3/16". Oh well.

I just found the certificate of the smog install. Consumer Affairs Bureau of Automotive Repair. The date was 1977.

My brother had a '78 Amc that had one. I remember them hooking it up for the smog test. It overheated if left hooked up. Just like you said. I see an adapter that I could use. Dorman 47304.

Yeah I figured it was something like that. I remember taking it apart and bypassing it. I use to have to do smog checks. There was also a window sticker with the smog kit number on it. I remember the smog guy got excited when he saw it.

This is still on my 70 Dart with a 318. I don't know when it was put on. The device has 2 spade connectors. It use to have a module that had a temp probe taped to the radiator hose. Plus a bunch of wires. The module is long gone and everything else. My question is how was this done from...

I just noticed some flashing on the side of the metal. Looks like they didn't get a good cut. Could of been affecting the spring tension. Some of the old spark plugs were up to 7.8k ohms. Ignition wires were up to 5.6k per foot. Coil wire was 6.9k per foot. Plus a chafed tach wire resting...

Thanks for the replies. It was an intermittent problem. More noticeable in the morning. I also put in a new ECU, checked carb, resistor, distributor, etc. So far so good.

I was doing a tune up on my 70 Dart. It hasn't been running too good lately. I noticed the rotor had some arcing or burn marks on it. Didn't see anything on the cap though. The rotor had 40k miles on it. I changed the wires,plugs and new cap and rotor. The wires and plugs had 90k on them...