I have a newly refurbed carb with 0.9 air corrector, 120 main and 1.4 2nd stage. It was running pretty much OK at 14psi T25 hybrid.
On startup, it runs nicely at 14.odd with minimal revs.
But now, as soon as it's revved, AFR drops to 10s and won't recover. Goes lumpy and doesn't respond to mixture screw adjustment.
It's as if the choke is on, but there is no choke and butterfly is wide open.
Black soot on exhaust elbow etc.
Also, when it was running right, all AFRs were bang on but after boost on cruise, they would go to 17 and the car would cutout.
I can't get my head round it and can't find a similar issue on the forum.
Any ideas?