I have this frustrating issue with my 73 Series III, Sometimes at speed typical 50mph + my truck starts to buck. It feel like a lose of power, I take my foot of the gas pedal and it seems to recover, but then as a gain more speed it starts again. It's fine going up the gears even at higher revs.
I've replaced the Carb, Coil, new Pertronix Flamethrower Distributor and new proline fuel pump. I'm still getting the same issue. The fuel filter and sediment bowls are clean and clear.
I re-timed it with both a gun and also by ear and feel, Its running right now at about 10˚ advanced, which I read is common with the Pertronix flamethrower setup.
Any thoughts? Cheers
I've replaced the Carb, Coil, new Pertronix Flamethrower Distributor and new proline fuel pump. I'm still getting the same issue. The fuel filter and sediment bowls are clean and clear.
I re-timed it with both a gun and also by ear and feel, Its running right now at about 10˚ advanced, which I read is common with the Pertronix flamethrower setup.
Any thoughts? Cheers
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