by Begle1 » Sat Feb 07, 2009 6:30 pm
First guess would be to check voltage at the shut-off solenoid. The wire on the top of the injection pump needs 12 volts for the vehicle to run; without 12 volts, it will cause problems as you describe.
1990 D-250 Regular Cab: Tweaked injection pump, built transmission, a cataclysmic charlie foxtrot of electronics, the most intense street-ran water injection system in the country, and some more unique stuff.