so i tried to change my valve seals but the tool to comepress the springs 50$ cracked on the second spring and also the compressor fitting was impossible to screw in the the spark plug hole. so the prob is after starting it a few minutes ago its running awful missing and surging from 450-800rpm please givee me some direction. also does anybody have the firing order im hoping i screwed that up

 

1-8-4-3-6-5-7-2 clockwise