its the mfi , well i have checked the plugs there all slightly wet, disconected the injectors checked they work they work fine, have 2 good coil packs to choose from they both produce good clean spark on every plug n i have aligned the coresponding notches on the dizzy and block to there original positions ,new plugs ,oil filter rebuilt engine it should start but nothing yet , tommorow im going to check the hoses around metering box make sure there no air leaks and add some more fuel as i only tried to start it with 6 pounds of optimax put into a empty tank thats been empty for years ,20 pounds of optimax in the morning