The wire could have a broken conductor near one of the terminals. Try swapping wires between #5 and say, #7.(to see if it is a wire)
Swap plugs arround (to see if it is a plug)
Check the distributor cap for crud on the terminals, or carbon tracing.


The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me