[Purdy Swoft]

If the spark is weak it can cause those problems .

I would first check the gaps at the rotor tip .

Be sure to check ALL four contacts in the distributor cap body , while you are at it .

Ford recommended a conservitive gap of twenty five thousands .

I run mine with a thirty five thousands gap at the rotor tip for a hotter spark at the spark plugs .

Back in the day , poor people would cut the plug wires and connect an old button between the two halves of the cut wire .

This operation gave a gap where the spark would jump across the button

Spark gets hotter when it jumps a gap , to a point .

Increasing the gap at the rotor has the same affect ..

It doesn't need a fouled spark plug for more gap to increase spark . A wider gap at the rotor tip gives hotter spark .

I like to also use a Pertronix flame thrower coil for hotter spark .

. Believe it or not , I can feel the power that the Flame thrower coil gives .

My spark plugs run clean …