Last week my mini decided it only wanted to run on 2 cylinders, so i spent hours messing round with my ignition and timing before noticing that my reasonably new fuel filter was basicly solid black and the fuel that was going through it was a dark brown. I took apart the float chamber and there was literally half an inch of sludge in the chamber. (Keep in mind that I have only had the car running for 1000kms or so since full over haul).
So I took out the fuel tank, fuel lines, carb and manifold out and started drowning things in meths. Replaced filter, and fuel lines and gave the carb and tank a thorough clean.
Put it all back together last night and now I have copious amounts of fuel in my carb/manifold. Anyone got any idea why I'm getting all this fuel building up?