1996 Ford Contour Repair Question
Topics covered: Sensor, Engine, Fuel injector.
Mileage: 160,000 miles.
Mileage: 160,000 miles.
Asked on September 22, 2012
Keep getting error code PO171
I have replaced Fuel Filter,Air Filter,MAF Sensor,New PLUGS,THERMOSTAT,WITH OLD MAF SENSOR HESITATES ON ACCLERATION,POOR GAS MILEAGE MAYBE 250 MILE PPER TANK,WITH NEW MAF SENSOR MISSES AT IDLE GETS A LITTLE BETTER HAS IT WARMS UP,HAD INJECTORS CLEANED,I USE TO GET 400 MILES PER TANK,DON,T KNOW WHAT ELSE TO TRY ? MAYBE FUEL PUMP,EGR VALVE,PVC NO LEAKS,INTAKE MANIFOLD NO VACCUUM LEAKS, HELP PLEASE
Asked by wayneweathermanAnswer
Replied on September 22, 2012
Which engine do you have?
Replied on September 22, 2012
also has new o2 sensors,It has a 2.0 16 valve Ztech motor
Replied on September 22, 2012
These are what can cause a P0171
HO2S and sensor connection.
Vacuum systems.
Fuel injector and/or fuel injector circuitry.
Powertrain Control Module (PCM).
Electrical circuits (HO2S, HO2S GND, INJ 1-8, VPWR and SIG RTN).
To prevent replacement of good components, be aware the following non-EEC areas may be cause of driveability concerns:
Ignition system.
Faulty evaporative emission system.
EGR and/or PCV system.
Air intake system.
Engine oil contamination.
Fuel system.
Exhaust system leaks or restriction.
Engine cooling system.
A scan tool would help for diagnostics.