Ok, please excuse the fact that I don't know much about engines, and except that I am posting this to learn more.

from my understanding, your pistons raise and lower 2 at a time ( - _ _ - and _ - - _ ), but I was taking apart my distro today replacing the ICM and thought about it. your cap and rotor is designed to fire only 1 spark plug at a time.

How can this be if two pistons are in the "firing position" at the same time, shouldn't 2 plugs fire at the same time?

Thanks

 

Because its a 4-cycle internal combustion engine.
Intake, compression, combustion, exhaust.

Even though two cylinders/pistons may be at top dead center at one time, however only one is in say in the "compression" phase while the other is in the "exhaust" phase.

 

Watch this, it might help.

http://video.google.com/videop...works

 

that video help a lot, thanks!

 

Never seen that video before Brad. That's awesome for those who don't know how they work. Notice how the Exhaust valve's are the ones that the piston is chasing on the way up. This is why most piston to valve contact is on the exhaust side.

 

That video is great but its only half the story, check it out
http://www.youtube.com/watch?v=MMKbRIlzmic

bonus "how vtec works video"
http://www.youtube.com/watch?v=_YRM_gD_tkQ

 

nice vids