Hello Peter,
I have been testing things here as well. Good to hear you got it working.
I just used the standard MIX eng 1(fsbus router) to get the fuel switch go on and off... ( i noticed that it is not 1 but just I16,0, RW..)
Not sure why you have put a 1 there...
Only problem is that i cant get my eng. in fs to start because the oilpresure isnt going up so i assum behind that offset 0890 there is something else that also is needed to get the eng started it now stick to a 25% and doesnt go higher. (if you switchit by mouse it will work fine..)
But ok if it works now by you dont touch it :P
My engines are starting in a complete other way so i dont have to deal with this problem only have try to help you out... (not bad a airbus builder is helping a 737

)
.....
A fuel engine warning led .. YES i have many leds .. the whole overhead is full of it :P so i have a faulure led on each tank ( left,right, middle ect ect.) But to be clear i dont use offsets of FS for this but i am working with 2 different progs for this now one is the A320 AST software and the other one is PMsystems and they work on a complete other way and without there software you cant use it.
So i am not sure how it is with the FS bus if you goto the PM page (
www.projectmagenta.com) and goto docs you can see the whole offset list of Peter Downson there and iam sure he also have a offset for that kind of things...
gr.
Frans M
www.airbus320.nl