I've read somewhere that its essential the trailing plugs fire independently, not like the leading plugs that fire together as wasted spark. Something to do with firing before the rotor is on the correct side of the E-shaft, causing pre-ignition? Can someone elaborate on this? Is this still correct if i run zero split?

I have a 4-post coil from DIYautotune - (2 posts per coil), fine for leading, but now i find out it's no good for trailing as they need to be independent?

For simplicity, i was going to fire both leading together and then both trailing together, or can i even fire all 4 plugs at once?

Whats the difference between FC and FD trailing settings?

Sorry if these are stupid questions - still a lot to learn

 

This answered most of my questions

https://www.rx7club.com/2nd-generati...ations-984864/

 

you can run no split if you want I know a couple guys that run no split without a problem.