hi there all have the last probs with my rst
basically have done these things
replaced
fuel meter head
fuel reg
fuel filter
fuel injectors
fuel lines
coil plugs
leads
ecus

it runs for 5 seconds or so may be 10 and dosent back fire and turns over fine just cant figure it out have also cheaked air leaks it almost sounds like it starving on fuel there is half a tank
the engine has been stood for 6 months or so can this be the prob any help pls thanks