did you swap the two plugs that i said round? because it sound exactly like the problem i had from the startin fine an idle but then miss.

dnt worry about the two colours for a min cos as you sed 1s a diffrent colour now.

there's a plug on a sensor underneath the inlet an the the plug on the aux air valve which is a circle silver thing with two pipes for vaccum one from top of inlet an the other goes to bottom of throttle body. they are the two i swapped an i worked fine

i went through the proccess of changing everything too metering head an all ignition parts an nothin worked so i just thought id give the sensors a go an i did it while the engine was runnin took the two off an as i plugged em back in it cut out started it back up an i ran great.

but if you have tried it an nothing them im stumpped mate you'll have to get a proffesional to take a look. good luck anyway i know how much of a pain they can be.lol