After dropping a new replacement carby on the A12 in my Sunny, I've got an annoying problem. When slowing down to a stop at lights or a junction, the engine stalls. It always starts up easily, but it's (very rude word of your choice) frustrating. I've replaced the unmarked main & secondary jets with a 96 primary & a 150 secondary, as in an A12 carby. Before this the car wouldn't drive properly on the main circuit as you could drive the car down the main jet. As soon as you screw the idle screw open, it takes the carby off the idle circuit, so I can't just turn up the idle. I've used a vaccum guage & got the best idle vaccum. I haven't changed the idle jet yet, as it's a different style to the one in the A12 carby. I haven't changed the air bleeds yet, or the idle airs, could this be the problem. At the moment I'm blipping the throttle to keep the engine running, not something you can do if you have to hit the brakes suddenly. It's not the brake booster, as it'll do it with no brakes too. Feel like I've wasted the money. Has anybody had experience with these carbies & know what could be the problem.