hello there, everyone.
i've a 1982 Daihatsu Charmant LE that seemed to have a mysterious never-ending issue with idling. it flat-out refused to hold the idle steady, but accelerates just fine under load even after multiple carb rebuild attempts. the exhaust sounds seemed out-of-rhythm too when that happens.
it's got a stock 4k-j engine and ofc, aisan carb. got that carb cleaned (again and again), and refitted with the repair kit (gaskets, jets, idle screw, steel balls, and etc). the float bowl is adjusted accordingly (lying flat on its own when turned upside down)
note that the distributor, ac fuel pump, carb thermal plate, breather valve are also functioning well. plugs indicate slightly lean mixture, with a very light brownish stain on the ground and the porcelain on each plug)
so, rollaclub fella, what gives?
have a nice day. cheers