Quote Originally Posted by brianrupnow
A coil should work in any position. Even if it is an oil filled coil, it will work in any position, but MAY eventually leak if ran upside down. I have to concur with C9X, if it works right side up but not when you turn it the other way, either you have a loose connection or an intermitant short inside the coil itself.----------Denny---she wanted a different answer
Not every coil is designed to operate in any position. Particularly true of high voltage coils. Very good. When you uncover part of the secondary (due to air inside depending on the make) it can short.

C9x, well Dr. Kitzmiller has seen 'em fail first hand. And laying on the side is usually OK as it does not tend to uncover the secondary. In this orientation any air is spread out real thin and usually won't uncover the secondary.

Of course one would always check for bad connections; this is assumed.

I agree with Dave.

Kitz