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TR2/3/3A I have this miss where the car will start and kinda idle

Yep, I would have chimed in on this one, Steve, but I knew you were up to the challenge. That and I knew from the start it would be something strange like that. Great job figuring it out!
 
I cannot remember the last time I replaced those black rubber seals on the bowls, maybe 8 years. What was interesting is the bowl aluminum or pot metal where the rubber sits was all corroded/ oxidized and the rubber had the oxidation pits on all around it like a chemical reaction. The oxidation took some work to get it off, I block sanded it with 220 on one and used a different one on the back.

I might have used some grease or some sticky gasket sealer when I put them in, but my guess is crappie synthetic rubber and the chemicals in gasoline caused the problem.

I replaced the rubber on both bowls with some I got from Joe a few months ago. Back in the day the rubber for those was red and very rubbery. I still have some old red ones that are kinda wore out, and they fell like rubber still. I see know the black ones I used were junk. I would think they would make them out of that fuel resistant neophrem or whatever it is call. I cannot remember where I got the ones that went bad, but it was not from a SU kit--- but separately purchased from one of the big 3
 
The alcohol in today's fuel didn't help, either. I am still very impressed you found such a small chunk of seal in the fuel passage!
 
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