Hey everyone. Yesterday I picked up a new ignition box and installed it today. It's a Mallory HyFire VI. The newer model with the LED displays on top and the buttons that let you set all its settings.

After I installed it, it fired right up with no problem. As I drove it I noticed my tach needle bouncing around pretty violently and the engine stuterring. It's very random. At idle the needle almost goes to 0 then bounces back to idle speed and the engine almost wants to die. What's REALLY weird is that I hear these "squeeks" inside the distributor. The sound sounds exactly the same as when a wire arcs to the block or a ground point. I turned off all the lights and wanted the motor in the dark and I couldnt see any arcing at all.

I'm thinking it's probably INSIDE the cap. Don't see why though ? I'm using a stock large cap, vacuum advance HEI dizzy, with a brand new Accel coil, accel cap and rotor and 8mm spiral core Accel wires. The module is bypassed and the pickup wires are connector directly to the box.

When I had my old MSD 6A connected to it this problem wasnt there. Is it possible the box is putting out too much voltage for the coil to handle ?!? DO I need to drill holes in the cap to let all the ionized air out ? Any ideas ? :/

 

Nobody has any ideas ? :/

 

sorry I dont know much about that stuff