Well...LOOOOONG story, some already covered on here but I'm pretty sure I've got to the bottom of the problems with the A engine. The cam is only making 16inches of vacuum. This is upsetting the fuel pressure regulator on the injection and making it run very rich at bottom end. I have an adjustable reg on there but if I turn it down to cure the bottom end richness it's going to run lean top end.
It's also not allowing the torque\convertor lock up vaccum switch to work but I can buy an adjustable switch to sort that one.
I know how to fix it but it's all a bit troublesome / complicated by using a 12volt vacuum pump , reservoir and transit or taxi auto throttle 'shuttle'.
So Im looking for a simpler /smaller solution .I can improve the bottom end richness by introducing a controlled air leak into the manifold via one of the takeoffs but need to close it off at higher revs.
Bugger, while typing this the solution has come to me , it's bit electrical still though so any mechanical ideas welcome still .