Jeremy, interesting. Guys I have the SAME affliction. Oddly, I just started the car after a month of sitting and it ran well longer ( about one minute) before deteriorating into a smoky clanky mess. It'll stay that way until its fully warm at 83.

I planned on the tank screen, but never reckoned it had any impact on the "just after cold start" running issue.

BTW, new nozzles, all tested. No change. ( better wot power)

Everyone says GLOWS. but again, the car just started after sitting in sub 0 (c) temps fr a month. It starts GREAT! and runs like new for about ten sencodns adn then.... whomp whompa, like it begins to miss soon after...

Tank is at 1/4 adn I plan on running it out this weekend.

Doe anyone know what the ARA actuator is on these IPs? I'm thiking it's a bad prechamber or a IP that needs service. Or this electrical hookup???

Im was going to give it a compression test first to rule out bad cyl pressures ( althohgh like I said, starts fine and runs new for half a minute).