slight misfire from cold

[maz894]

hi, i have put a rebuilt m20b25 engine in my car which i built my self. it seems as though the car has a slight misfire when cold but sorts itself out when warm. i have used my old afm from my old 325 which i think was adjusted slightly. could this be the problem, if so how do i go about readjusting it back to standard?
thanks

[maz894]

i will have them checked and cleaned if poss. would somewhere like kwik fit be able to check and adjust the afm for me?
thanks for the quick reply

[maz894]

[eltel]

any garage that does m.o.t's will have an exhaust gas analyser... with that shuved up your chuff as it were you can accurately set the mixture.