car wont idle at all now,its up and down and when driving when ya come to a stop it almost drops so low it cuts out.i re built the carb a while back and changed the air/fuel mix screw and has been fine until today it started to run a bit funny so i adjusted the air/fuel screw a bit to see if i could sort it out but now it wont idlethe car is up for sale and has been fine since iv had it until the last two weeks since its been on ebay.already had to take it off once as the rear engine mount went,plus the fuel pump relay the week before that,its driving me made might have to take it off ebay again now until i get this sorted.