check the timing
as has been said before, they only need a couple of things so do a process of elimination
check each cylinder has a strong spark
check its getting fuel and air
if it has these 3 then really it should run
4kc lying up for 8 mths..got her goin.new plugs,fresh juice,leads new,sprayed shot of carb cleaner etc but still very lumpy at idle,wnt tik over properly,,,clears out wen u give her a gud dig of throttle but bak to lumpy/like missing on 1 cylinder wen low revs..clears wen i spray carb cleaner 4 few seconds...cnt figure it out..new inline filter,petrol is clean...wtf
check the timing
as has been said before, they only need a couple of things so do a process of elimination
check each cylinder has a strong spark
check its getting fuel and air
if it has these 3 then really it should run
If the motor clears and runs nice when you spray the carb cleaner around the outside of the manifolds, then that means you have a air leak. Either plug up your leaking hose, or get a new manifold gasket.
whipped off carb,exhaust and intake manifolds...new bolts and gasket sealer...cleand carb best i cudand put her bak 2gether...still missing tho,like a bad lead but ther all new..i can defo hear a miss especially standin behind the car,but all leads seem to hav gud spark..she tries to clear out wen driving now and again but she jus cant do it..wot shud timing b set at does ne1 know?
advance 4~ worked pretty good for my 4ks. it might work for you or you might want to churn it out all the way advance and then turn it back untill it stops pinging.( what most guys on here would do)
Check the compression.
Get new points.