i am now some what miffed as after repairing the vacuum actuator i have now got a misfire intermitantly back and the white / grey smoke now has blue smoke on occassion and not only when misfiring. Has anyone got any suggestions as i am now not sure which way to go. there are definitely no leaks on the cooling system as i have had the engine running for sometime today after re-antifreezing it, also there is good compression across all cylinders......