Hi,
My son's 1980 Mini 998 appears to missfire slightly when flat out or when cruising.
I've checked the the ignition timing and replaced the plugs, leads, condensor and have adjusted the points (they look like new). I've also checked the mixture using a colour tune and it appears ok.
However, from my internet searching, the engine number, 99H 791 (1974 onwards), doesn't stack up with the distributor, 41882A 58D4 (Mini 1988 onwards). Is it possible that the vaccuum advance curve on the later distributor doesn't match the engine and could be causing the problem?
I'm contemplating rebuilding the carb and changing the coil but I'd like to know if the distributor could be the issue first.
Thanks for your help,
Chris