VISUAL INSPECTION
Visually inspect all electrical wiring, looking for chafed, stretched, cut or pinched wiring. Ensure electrical connectors fit tightly and are not corroded. Ensure vacuum hoses are properly routed and are not pinched or cut. Inspect air induction system for possible vacuum leaks.
Tandem Fuel Pump Pressure Test
Note. If operator has indicated the high fuel restriction lamp has been illuminated, a restricted fuel filter may be causing low fuel pressure.
Connect Rotunda High Fuel Pressure Adapter (014-00931-3) to the Schrader valve mounted in the fuel regulator block on the side of the fuel filter housing. Connect a line for a 160-psi gauge to the adapter. Run the engine at low idle and check for leaks in the line to the gauge. Operate the engine at WOT (maximum engine speed out of gear with the brakes set and the wheels blocked). Measure maximum fuel pressure and compare to specification. See appropriate FUEL PRESSURE SPECIFICATIONS article under SPECIFICATIONS. Repeat for front and rear tanks. Change the fuel filter if the pressure is low and retest. If fuel pressure is still low, go to TANDEM FUEL PUMP INLET RESTRICTION and check restriction from the fuel tank.
NO-START DIAGNOSIS
Note. No-start is defined as engine cranks okay, but does not start. Engine may fire a few times.