My series two has developed a misfire when under load and doing 2500rpm or more. it idles fine. has checked plugs and done a comp test while i was at it this was fine too any ideas on what else i should be checking?

Thank in advance for any help

Cheers
Pete

 

plug leads rotor arm and dizzy cap and coil

 

Right i checked all ignition components and they were all fine so put a new fuel pump on and then found i wasn't getting any fuel out of the no. 2 injector so changed that as well. car has been spot on until today it has developed the same scattered misfire as before
Any ideas anyone