Really doing my head in now!!!! The only way to keep idle is to have the idle screw really far out. That's not right is it! I've been on it for a while today and now giving a break before i set a bloody hammer to it

so I'm disconnecting the switch from the metering unit, revving at 3k for 30 seconds and adjusting the idle screw to get around 900-1000rpm. That's right ain't it.... But it's running lumpy as fuck. I kept doing it and now have it running ok(ish) at 1000rpm but smoke is visible from the exhaust. Nothing excessive or noticeable really, but I see it and it weren't there before I fiddled with it.

Think I'll just wait now till the guy who fitted the engine to look at it on Monday.