Hey all, I'm trying to get my '83 through DEQ and failing miserably. Last trip through I had 2600 PPM HC at idle and the max allowed is 220.

I'm running a Weber 32/36 fully desmogged but as part of my process here I've hooked the air injection back up and it's functioning properly. My cat is dead, I've determined with a laser thermometer, but even without it the truck shouldn't be running this dirty.

I've replaced the plugs, cap, and rotor and here are the plugs I pulled out. The far right one is the #1 cylinder and it has that white crust on one side. Would anyone care to read these for me?



I did find that my radiator was a little low on coolant. And the engine seems to be shaking more than normal at idle. It runs strong through the range, though, and doesn't seem to be straight up missing. There is no burning coolant smell or vapor in the exhaust.

My theory is that I have the electrolytic head corrosion at the #1 cylinder and enough coolant is getting in to foul the ignition enough at idle to create the roughness and send tons of HCs down the pipes. Does that seem likely?

 

these looks like burnt out