[SteveStromberg]

My 72 914 has a strange problem its a 2.0 Twin 44 Idfs, 009 with Coumpufire, when insalling the motor I put in a New Coil, Cap, wires ect these items have maybe 3k. Heres the problem: While driving the Tach will swing from 1k to 7k wildly and the motor will start to miss. My battery reads 12.6 without the motor runnings , 13.4 with it running,I checked the ground strap,and made sure that the spark plug leads were not close to each other or the Coumpufires coil to dist., I have Cleaned the Carbs,adjusted the valves, Checked the ground on the fuel pump (I have 4 psi). Could it be that the Coumpfire is Bad? its the only thing I have not changed. Any Ideas? I have swaped the tach out for another, no change.
Also it comes and goes the car will run really strong then wild swinging and missing.
Steve