Fuel pressure at about 50lbs. New fuel filter, governor, air flow sensor, throttle position sensor, and fresh tune up. Truck has been worked on by 4 different companies and still will not run correctly. The engine looks like an automotive type with a horizontal intake and a mass air flow sensor inline. Never experienced this engine and have no information on it as far as voltage checks. Impco PSI program will read the codes and there is many but the screen stays light and will not allow me to clear them. It has the standard spectrum 4 post plug and a OBD2 style plug on the valve cover.
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