I know that Decker's vin#5000 had similar problems that you described, last year. Bill Lane and myself, mostly Bill, removed the intake cleaned the fuel system and checked everything that we could think of to no avail. Turn out to be a collapsed fuel line going to the accumulator. Just a guess, but I think that I would check this. The hoses are heat sealed and if done incorrectly they will collapse. Rob Grady can most likely prepare a replacement fuel line for you. Just a thought. Robert Starling Vin#05252