hey all, my KS when cold, seems to stutter pretty bad. In neutral it idles well, when moving the car and accelerating, unless warmed up for a good 5 mins, the engine stutters then slowly gains more momentum, as if it's getting choked with fuel or something. Also, after a few seconds of stuttering blake smoke comes out the exhaust, but the stutter goes away after temp has reached 1/2.
I've replaced spark plugs, car runs fine when hot, can anyone think of the most likely source of this problem so I can fix it? Or could it be just the engine and I need work done to it?