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Air in fuel system Bleed air from system Incorrect or contaminated Replace fuel fuel Injector nozzle malfunction Check nozzles, see FUEL SYSTEMS Engines Starts Injection pump timing Reset pump timing, see and Idles Rough incorrect FUEL SYSTEMS W/out Smoke or Engine not fully broken in Put more miles on Noise, But Clears engine After Warm-Up Air in system Bleed air from system Injector nozzle malfunction Check nozzles, see FUEL SYSTEMS Engine Idles Blocked fuel filter Replace fuel filter Correctly, Injection pump timing Reset pump timing, see Misfires Above incorrect FUEL SYSTEMS Idle Incorrect or contaminated Replace fuel fuel Engine Won’t Fast idle adjustment Reset fast idle, see Return To Idle incorrect TUNE-UP Internal injection pump Replace injection pump, malfunction see FUEL SYSTEMS External linkage binding Check linkage and remove binding Fuel Leaks On Loose or broken fuel line Check lines and Ground connections Internal injection pump Replace injection pump, seal leak see FUEL SYSTEMS Cylinder Injector nozzles sticking Test injectors, see Knocking Noise open FUEL SYSTEMS Very low nozzle opening Test injectors and/or pressure replace Loss of Engine Restricted air intake Remove restriction Power EGR valve malfunction Replace EGR valve Blocked or damaged exhaust Remove restriction system and/or replace components Blocked fuel tank filter Replace filter Restricted fuel filter Remove restriction and/or replace filter Block vent in gas cap Remove restriction and/or replace cap Tank-to-injection pump fuel Check fuel lines and supply blocked connections Blocked fuel return system Remove restriction Incorrect or contaminated Replace fuel fuel Blocked injector nozzles Check nozzle for blockage, see FUEL SYSTEMS Low compression Check valves, rings, pistons, see ENGINES Loud Engine Basic timing incorrect Reset timing, see Noise With Black FUEL SYSTEMS Smoke EGR valve malfunction Replace EGR valve Internal injection pump Replace injection pump, malfunction see FUEL SYSTEMS |