[jdmccright]

I wouldn't suggest using water to blast it out. The tank has baffles that are designed to retain gas near the pump and sucking in water can be bad for the pump and sender...rust can form quickly. I'd use a solvent instead such as carb cleaner or a bottle of your favorite fuel system cleaner (the exception being a methanol- or ethanol-based cleaners...these can cause rubber parts to swell up in high concentrations and long soak times). It can dissolve any gunk that has formed and help pass it through the pump easier. Plus, any cleaner still left in the system can be burned by the engine or dissolve into the gasoline.

Also, some fuel injection systems will automatically shut the pump off if it doesn't detect the correct fuel pressure or after a certain length of run time with the engine off. I had to drain my truck's tank last summer and had to cycle the key on/off a number of times to keep the pump running.

Hope this helps!