Hi all. Carb 3 keeps fouling up, in turn fouling the plug and then the 3rd cylinder won´t run. I´ve had the breather aparatus off and cleaned out, cleaned the plug filter. I noticed the O ring was no was missing between the throttle body and the cards (if this is the problem why only 3 pot) She´ll run for a couple of tanks then 3 pot dies again. I have a pc but put it back on the Honda ecm, does it on both anyway. Her current range is 102 miles before the fuel light comes on. Any advice on what to do next would be welcome.