Replace any plastic or rubber hoses as they are prone to perish with heat at the engine same are ronound for itFinally got it, I think !!!!! Went back and took off the Bango seals and they were full of dirt as well. Cleaned then out and fuel is flowing now. Also spotted a small leak in the seal over the fuel filter that is cracked and leaking fuel. Didn't notice it before as wasnt leaking until the full pressure was returned to system. That's for all yer help Mur and lads. Took me a few days of trying to figure it out and would be still there without yer help.!!!!