Step by step guide to ignition timing?

[mr.bishi]

Hey all.....sorry for the threadromancy,but i have a quick timing related question.

I picked up an s12 auto at the weekend and it was having running problems....not helped by the dizzy being loose!

Obviously,i need to set the timing,so....Is it set using no1 or no4 on firing stroke? I've had a look in the manual,but it didn't seem to say...

Cheers..