|
|
Content .. 1395 1396 1397 1398 ..
under FUEL SYSTEMS in REMOVAL & INSTALLATION - F150 PICKUP - BI-FUEL - TEST H: FUEL CONTROL Diagnostic Aids Enter this test only when all steps under QUICK TEST have been successfully completed and engine still does z Heated Oxygen Sensor (HO2S). z HO2S and VPWR circuits and connections. z Compuvalve. z Vacuum systems. HO2S-11 and HO2S-21 circuits are monitored by compuvalve. Information is used by compuvalve for fuel trim z HO2S circuits are open or shorted to ground. z Faulty HO2S sensor. z Consistently lean or rich fuel system z Faulty compuvalve. z Faulty harness circuits (HO2S or VPWR). z Intake air leaks. z Plugged injectors. z Pressure regulator inoperative. z Exhaust leaks. z PCV system. z Ignition system faults. z Low compression. HO2S SENSOR OPERATING VOLTAGE SPECIFICATIONS Condition HO2S-11 Voltage HO2S-21 Voltage KOEO Below One Below One
2003 Ford Pickup F150 2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG
|