Chart 1

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, 2011 Ford Fusion, 2010 Mercury Milan, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Engine Runs Rough
Engine Misses
Stalls/Quits: Idle, Acceleration, Cruise
Buck/Jerk
Hesitation/Stumble
Surge
Unique Idle Concerns: Rolling Idle

NOTE: The engine may stall if left running while refueling, or it may restart if the ignition is not cycled to ACC or OFF position before refueling. Advise the customer to turn the engine off while refueling to avoid contamination or damage to the evaporative emission (EVAP) system.

SYSTEM/COMPONENT	REFERENCE ( ENGINE CONTROLS - PINPOINT TESTS -- FUSION HYBRID, MILAN HYBRID & MKZ HYBRID unless noted)
Check the following parameter identification (PID)s: LONGFT1 (value between -20 and +20) VPWR (value between 10.5 and 17.0 volts, and within 0.5 volt of battery voltage)	LONGFT1 value low (-): Continue diagnosis. Concentrate checks in areas that cause the engine to run rich. LONGFT1 value high (+): Continue diagnosis. Concentrate checks in areas that cause the engine to run lean. VPWR not between 10.5 and 17.0 volts: REFER to the CHARGING SYSTEM VPWR between 10.5 and 17.0 volts, but not within 0.5 volt of battery voltage: CHECK B(+) supply to the powertrain control module (PCM) power relay. CHECK the VPWR circuit between the PCM and the PCM power relay. CHECK the PWR GND circuits.
Mass Air Flow (MAF) Sensor	GO to PINPOINT TEST DC .
Secondary Ignition System	GO to PINPOINT TEST JB .
Fuel Delivery System	GO to PINPOINT TEST HC .
Exhaust System	GO to PINPOINT TEST HF .
Positive Crankcase Ventilation (PCV) System	GO to PINPOINT TEST HG .
Evaporative Emissions (EVAP) System	GO to PINPOINT TEST HX .
Heated Oxygen Sensor (HO2S)	GO to PINPOINT TEST DZ .
Base Engine	REFER to the ENGINE MECHANICAL - 2.5L (HYBRID)
Intake Air System	GO to PINPOINT TEST HU .
Additional Testing	GO to PINPOINT TEST Z .
Additional Checks: Correct PCM vehicle identification (VID) block information. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . Be aware of the engine RPM/speed limiting functions of the PCM (look for an incorrect high vehicle speed signal from the anti-lock brake system (ABS) module, the transaxle control module (TCM) and the engine and generator speed). Driveline and electronically controlled continuously variable transaxle (CVT) Speed control system (for surge with speed control on)	REFER to the appropriate Service Information.
Brake Over Accelerator	For brake over accelerator feature activation, CHECK the BRKOVR_ACTION, BRKOVRD_POSS, and DIST_BRKOVRD PIDs for recent simultaneous brake pedal and accelerator pedal operation. ADVISE the customer that simultaneous brake pedal and accelerator pedal operation by the vehicle operator activates the brake over accelerator feature. REFER to POWERTRAIN CONTROL SOFTWARE for additional information.