Motorcraft Home Technical Resources Home Non-Subscription Resources What's New Body Repair Manuals Diagnostic Tool Support OBDII Theory & Operation Paper/CD Manuals Quick Guides Tools & Equipment Membership Accounts My Shopping Cart Subscription Products Keycode Lookup Reprogramming & Initialization Service Publications Technical Service Bulletins Technical Training Purchase Subscription Ford Specific Acronyms # A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  0-9  (Indexed by Abbreviation) Acronyms Description M/T Manual Transmission/Transaxle M5OD Manual 5-Speed transmission with overdrive (RWD). M-85 Fuel containing 85% methanol alcohol. MAF Mass Air Flow MAF RTN Mass Air Flow Return. A return circuit for the MAF sensor. MAP Manifold Absolute Pressure. The internal pressure of the intake manifold. MFC Medium Fan Control MFI Multiport Fuel Injection. A fuel-delivery system in which each cylinder is individually fueled. MFP Modulated Fuel Pump Microprocessor A device that controls logic and arithmetic functions. MIL Malfunction Indicator Lamp. An indicator lamp alerting the driver of an emission related malfunction. MISF Misfire. Any event in the cylinder that causes a sudden change in acceleration of the crankshaft. MON Motor Octane Number MSOF Manual Shift-on-the-Fly MY Model Year

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