19010-00910 BODY ASSY, INJECTI Denso Cross

Fuel System Inspection
A problem with the components that send fuel to the engine can cause low fuel pressure. This can decrease engine performance.1. Check the fuel level in the fuel tank. Look at the cap for the fuel tank to make sure the vent is not filled with dirt.2. Check the fuel lines for fuel leakage. Be sure the fuel supply line does not have a restriction or a bad bend.3. Install a new fuel filter. Clean the primary fuel filter.4. To remove air from the fuel system, use the procedure that follows:PC Engines:
a. Use the priming pump to remove air from the low pressure side of the fuel system.b. Loosen (one at a time) the fuel injection line nut one-half turn at the valve cover base adapter. Use the priming pump until fuel without air flows from the loose connections, then tighten the nut. Repeat the procedure for each fuel injection line.DI Engines:
a. Use the priming pump to remove air from the low pressure side of the fuel system.b. Loosen one-half turn the fuel injection line nuts at each adapter in the valve cover base. Move governor control shaft to LOW IDLE position. Use the starter motor to turn the engine until fuel without air flows from the loose connections. Tighten the nuts. Because of the check assemblies in the injection pump outlets for the DI engine, the priming pump will not give enough pressure to remove air from the fuel injection lines.5. Inspect the fuel bypass valve to see that there is no restriction to good operation.Checking Engine Cylinders Separately
An easy check can be made to find the cylinder that runs rough (misfires) and causes black smoke to come out of the exhaust pipe.Run the engine at the speed that is the roughest. Loosen the fuel line nut at a fuel injection pump. This will stop the flow of fuel to that cylinder. Do this for each cylinder until a loosened fuel line is found that makes no difference in engine performance. Be sure to tighten each fuel line nut after the test, before the next fuel line nut is loosened. Check each cylinder by this method. When a cylinder is found where the loosened fuel line nut does not make a difference in engine performance, test the injection pump and injection valve for that cylinder.Temperature of an exhaust manifold port, when the engine runs at low idle speed, can also be an indication of the condition of a fuel injection valve. Low temperature at an exhaust manifold port is an indication of no fuel to the cylinder. This can possibly be an indication of an injection valve with a defect. Extra high temperature at an exhaust manifold port can be an indication of too much fuel to the cylinder, also caused by an injection valve with a defect.The most common defects found with the fuel injection valves are:1. Steel wire brushing of nozzle tip.2. Orifice wear.Testing Capsule-Type Fuel Injection Nozzles
5P4150 Nozzle Testing Group 5P4720 Fitting5P8744