My check engine light flashes on and off periodically. The engine code says number one cylinder is missfiring. Usually there is no noticable loss in power, but if it happens during a stop, there is a noticable shudder when I accelerate.
I changed plug and wire to number one cylinder and it went away for a couple days, but has returned.
Any suggestions would be appreciated.

It could be the alternator failing.

YogsVR4? Must you bring your political agenda and opinions to an automotive forums board?