Hello, I have 73' Super Beetle. 1600cc stock engine 009 distributor, 34 pict 3 carb. The problem is that after the car is warmed up it runs fine at high speed. But at low speed it jerks and studders and sometimes dies. It idles fine. The carb has been rebuilt, but did not cure the problem. Now they are changing the points and condenser. Fuel filter is clean. Would the condenser or points do this?