The plugs are the correct ones, so ther shouldn't be any problem with them.
The heat spots sometimes occurs when the plugs are not the correct heat range.
Make sure that the rotor of the distributor, are perfectly aligned with the mark in the distributor, when the flywheel shows the "T" mark.
If wires, rotor and distributor, and plugs are in order, maybe your problem is a faulty ECU.
Check the resistance of all the wire one by one. I think that the correct value is 5 kilo ohmn per wire.
But in case that some wire were the problem, you should felt a misfire, not a ping.
Last edited by 33Rosso; 03-19-2017 at 08:55 AM.