|
|
4 DIAGNOSIS XE engine fuel system 95 XF series 5-4 FAULT: REDUCED POWER AT ALL SPEEDS Possible cause Remedy Poor fuel quality. Drain fuel, rinse the fuel system, replace the fuel Fuel fine filter/fuel coarse filter blocked. Replace the fuel fine filter and clean the system. Pompunits mechanisch defect of verstopt. Replace the pump units. Accelerator pedal sensor, mechanical defect. Check: mechanical connection sensor/accelerator - accelerator pedal sensor. Mechanical defect or clogging of pump units. Replace the pump units. Injector defective. Check the injectors. Pressure-relief valve on pump housing does not Check gallery pressure. Fuel lift pump output too low. Check: the fuel lift pump and replace, if necessary - gallery pressure. Fault in electrical components/wiring of: accelerator pedal sensor - sensor for engine coolant temperature - boost pressure sensor - fuel temperature sensor - connectors. Check the electrical system. FAULT: REDUCED POWER ABOVE A PARTICULAR SPEED Possible cause Remedy Fuel fine filter/fuel coarse filter partially blocked. Replace the fuel fine filter and clean the system. Mechanical defect or clogging of pump units. Replace the pump units. Air leaks in inlet system. Pressure-test the inlet system. Pressure-relief valve on pump housing does not Check gallery pressure. Fuel lift pump output too low. Check: the fuel lift pump and replace, if necessary - gallery pressure. Fault in electrical components/wiring of: electro-pneumatic boost pressure valve - connectors. Check the electrical system. 1 © 0008 |