High throttle miss

[Texasdoc]

Re-gapped the plugs - all now at 40 again. Went back to 82 on the secondary jets. Still at 6.5 on the Primary PV. Changed the coil. Tested the resistance of the wires - all uniform. Took off the valve covers (again), disconnected the coil lead, and spun the motor with the starter a few revolutions. All rockers/valves going up and down without any problems or apparent errant noises - so I guess no broken springs.

Now it's midnight in Suburbia so I couldn't test it. We will see what tomorrow brings. Still haven't been able to install the WBO2 gauge. Maybe next week if it doesn't run with the replacement coil.

Question still open - does having the square (TFI) type coil matter?

[blykins]

Originally Posted by Texasdoc

Re-gapped the plugs - all now at 40 again. Went back to 82 on the secondary jets. Still at 6.5 on the Primary PV. Changed the coil. Tested the resistance of the wires - all uniform. Took off the valve covers (again), disconnected the coil lead, and spun the motor with the starter a few revolutions. All rockers/valves going up and down without any problems or apparent errant noises - so I guess no broken springs.

Now it's midnight in Suburbia so I couldn't test it. We will see what tomorrow brings. Still haven't been able to install the WBO2 gauge. Maybe next week if it doesn't run with the replacement coil.

Question still open - does having the square (TFI) type coil matter?

Just as an aside....

A broken spring can still let a valve go up and down. If it's cracked or broken, it will let the valve float because the spring pressure is greatly reduced.

I'm of the mind that it's ignition too, but I'm trying to cover all bases.