I'd try harsher words.

Kidding aside though...it could be a wire on it's way out...as nice as it looks...if it is only making a connection part of the time...how old are the wires?

Also, you could try seafoaming it...could be a sticky valve if it has higher mileage on that cylinder...

Or, since it is free...take your ICM off and have it tested at your local auto parts store.