you can also try taking the input line to the fuel pump and dropping it into a jerry can of gas and see if it works then, if not then check for fuel comming out of the pump, may be an idea to pull all the plugs to make it easier on the battery when checking the pump. If the pump checks out ok then blow the fuel line from the pump back to the tank and add a fuel filter at the tank to stop the crud from getting back into the line.