[cameron.arnott]

Ok maybe third time lucky.

Ive taken off the pertronix and put the points back in, played with the timing from 5 degrees ATDC to 10 degrees BTDC, changed the mixture screws, and changed the idle jets from 60's to 55's but the idle is still sitting high at between 1500-2000 rpm. I can pull it back down when driving by running the revs right down when the car is in gear as I pull up to the lights but sometimes even then it climbs back up again.

The ignition co. I sent the dizzy to removed the old vacuum advance unit that used to just be plugged off. I am wondering if the old vac unit was still fulfilling some role of pulling the advance back to idle? I.e. was the diapragm acting to pull the advance weights back as the engine came off idle or is this not possible in any way with a plugged vacuum? Its a 010 Bosch dizzy from a '73 'S'.

C'mon guys help me out here...! Please