POSSIBLE PROBLEMS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION NO YES NO YES FUEL SYSTEM 2-106      Change 1 B3 GO TO D, Page 2-112 GO TO I, Page 2-126 DOES THE ENGINE START AND STAY RUNNING WITH THE FUEL RETURN LINE (THE SHORT RUBBER LINE AT THE INJECTOR PUMP) DISCONNECTED? RECONNECT THE ABOVE WIRES. CHECK FUEL PUMP PRESSURE AND VOLUME DURING CRANKING. IS PUMP PRESSURE GREATER THAN 3 PSI (20.69 kPa) AND FUEL VOLUME AT THE INJECTION PUMP INLET 1 PINT IN 30 SECONDS? STE/ICE-R TEST 24 (Page 2-738) FUEL PUMP VOLUME TEST Positive pressure and volume indicate that fuel is present and supply lines and filter are not plugged.  This is a test of the lift pump. OTHER SYSTEMS   LISTED ABOVE OK FUEL PUMP FUEL SUPPLY LINES FUEL RETURN LINES FUEL FILTER FUEL SOLENOID/WIRING HIGH PRESSURE SYSTEM FUEL PUMP OK FUEL SUPPLY LINES OK FUEL FILTER OK FUEL RETURN LINES FUEL SOLENOID/WIRING HIGH PRESSURE SYSTEM A restricted fuel return line will cause a pressure imbalance in the pump and prevent the engine from running. B FROM 2, Page 2-96 GO TO B4, Page 2-108 B2 KNOWN INFO     PUT THE RETURN LINE IN A     SUITABLE CONTAINER AND     TRY STARTING THE ENGINE. POSSIBLE PROBLEMS REASON FOR QUESTION NO YES GO TO N, Page 2-132 STE/ICE-R TEST 90 (Page 2-751) MULTIMETER FUEL PUMP FUEL SUPPLY LINES FUEL RETURN LINES FUEL FILTER FUEL SOLENOID/WIRING HIGH PRESSURE SYSTEM B1 KNOWN INFO ENGINE DOESN'T STAY   RUNNING Current through the wire quickly checks the integrity of the fuel system wiring.  The normal reading will be about 1.3 to 1.5 amps. TEST OPTIONS DIAGNOSTIC FLOWCHART DISCONNECT THE GLOWPLUG CONTROLLER AND WIRE 569B/569D FROM THE INJECTOR PUMP.  MAKE SURE THAT WIRE 54A IS PROPERLY CONNECTED TO THE INJECTOR PUMP.    WITH THE ROTARY SWITCH IN "RUN" POSITION, DO YOU HAVE AT LEAST 0.5 AMPS DC FLOWING THROUGH WIRE 54A? TEST OPTIONS TM 9-2320-280-20-1