Hello Lee, I had the same problem on my own van a few years ago after I fitted a fuel metering solenoid. I ended up putting a prime pump in the feed line, loosening the solenoid & priming. Also I took the injector pipes off & pumped primer while turning the engine with a spanner on the crank bolt. It was a right mare but as I had only changed metering solenoid I figured there had to be trapped air in the pump. Got there in the end.