put a new metering unit on still the same gettin fuel at the injectors getting a spark but its still missing like a bitch when it does start,some one said the distibutoror could it be my wireing its realy getting me down now well pissed off

is there anyway of checking the dizzy ?i did notice the dizzy is fully advanced /retarded up to the nut and when i try to adjust it while holding the throttle it gets worse this dont seem right being that far adjusted weird any ideas appreciated cheers