OK Ive got the first headache before m.o.t

at last
Ive searched allover can't find an answer the car is a mk2 16v pre 90spec loom. Its now got a abf now running k-jet. Ive swapped all electric components timing is spot on been done with a gunson strobe and it still misses under load sometimes it seems to clear
And the c0 screw aint been set at 2%
