BUSHING-TRACK 1651770 - Caterpillar

Probable Causes
Poor fuel quality
Air in fuel
Binding of the fuel injection control linkage
Faulty unit injector
Plugged fuel return
Incorrect fuel injection timing
Incorrect valve setting
Air inlet restriction
Internal engine problemRecommended Repairs
Poor Fuel Quality
Ensure that there is good, clean fuel in the tank. When possible, interview the operator in order to determine if fuel quality is in question. Try to determine if the engine started misfiring soon after refueling. Refer to Troubleshooting, "Fuel Quality".Air in the Fuel
Check for air in the fuel system. Refer to Troubleshooting, "Air In Fuel".Binding of the Fuel Injection Control Linkage
Ensure that the fuel injection control linkage is not binding. Refer to Troubleshooting, "Fuel Injection Control Linkage".Faulty Unit Injector
Refer to Troubleshooting, "Unit Injector Misfire" and Troubleshooting, "Unit Injector".Plugged Fuel Return
Remove the fuel return passage check valve. Remove the pressure regulating orifice. Inspect both the check valve and the orifice for signs of blockage.Incorrect Fuel Injection Timing
Check Fuel Injection Timing. Refer to Systems Operation, Testing And Adjusting.Incorrect Valve Setting
Check valve adjustment. Refer to Systems Operation, Testing And Adjusting.Air Inlet Restriction
Check the air inlet system. Also inspect the turbocharger.Internal Engine Problem
Check for signs of damaged valves, damaged cylinder head gasket, etc.