over the past 3 month i have had my car running but not brilliant. however ther past week it wont start at all. it started missing so i replaced the leads plugs cap and arm. it was ok for the day then it wont start at all. it turns over fine. i have put all the original leads etc back in and checked them all. I have a spark on all plugs/ leads and have fuel upto the carb. my timing was slightly out but have sorted that but for some reason the firing order on my car is back to front. i.e No1 lead goes to piston 4 from the flywheel etc. if i put the leads in as they should it just sits there popping at me.