I had the same problem with a car that sat up. Tried all the complicated stuff first, then I read about pumping a little lacquer thinner through the ip. It worked like a charm. Basically I pulled the injection lines off the pump,put the hose coming from the tank into a cup of thinner, cranked for about fifteen seconds and then let it sit for about two hours. Reconnected the fuel line and bled, and turned over for another 10 seconds. Fuel popped from each port as it should and after reconnecting everything the car started just fine.