Tried everything but I think it may be the right carby bowl leaking noticed fuel wet on the outside so l guess on full boost it may be loosing some air pressure which I guess would throw the engine way out of balance as those cylinders would be lacking some fuel , previous owner has overtighned the bowl ,apparently a common problem, now I have to figure how to fix it, maybe some sealer any ideas
q 1 does this aircraft have return line from carby to main tank q2 what is the part number on the fuel pump q3 have the fuel lines been recently replaced q4 what do you mean by common problem apparently for crist sake find a l2 that knows what he is doing before you kill your self blunt enough neil