Tom,
Check the little filter mentioned above and also triple check for ALL vacuum plugs. If you have a minute crack in one of the plugs (I did and it drove me nuts finding the trouble) it will do similar to your problem. Loss of vacuum causes variations or immediete loss of power.
Not the unluckiest man on earth, close maybe, but you'll get it then move on and forget all about it.


A word to the wise is not necessary. It is the stupid ones who need the advice. Pat