Introduction The Fox Body Mustang switched to using a Mass Air Flow meter to measure airflow in 1988 in California.  Box codes “A9S” and “8LD” are known examples.  Uses TFI distributor, sequential injection for up to 8 injectors, MAF air metering.  This particular EEC-IV system became the blueprint for the popular A9L / GUFB used […]

Introduction The first EFI ECMs used by Ford were speed-density featuring a MAP sensor and either a manual or hydraulically shifted automatic (C4/C6/AOD/etc) transmission along with electronically controlled ignition advance with a distributor.  They’re commonly found on early fuel injected Ford trucks like F150, 250, 350, Broncos and even early speed-density 5L mustangs/crown vics/etc. Later […]

Introduction Some 94-95 Trucks (mostly F150) came equipped with a 4R70W automatic transmission.  Most of the heavier-duty trucks came with AOD-E transmissions and use incompatible ECMs.  These ECMs feature sequential fuel injection, a distributor for spark delivery, Mass-air flow (MAF) sensors for air metering and most importantly are set up to control a 4R70W electronically-controlled […]

Introduction 94-95 MAF Trucks are an interesting breed.  They feature sequential fuel injection, a distributor for spark delivery, Mass-air flow (MAF) sensors for air metering and most importantly are set up to control an E4OD electronically-controlled automatic transmission.  Aside from their original application, these ECMs are commonly used for speed density->MAF conversions on speed density […]

Introduction 94-95 MAF Trucks are an interesting breed.  They feature sequential fuel injection, a distributor for spark delivery, Mass-air flow (MAF) sensors for air metering and most importantly are set up to control an E4OD electronically-controlled automatic transmission.  Aside from their original application, these ECMs are commonly used for speed density->MAF conversions on speed density […]

Introduction Early Fox Body Mustangs used a speed-density metering system from 1986-1988.  Uses TFI distributor, 8 injectors, speed-density metering.  This EEC-IV system isn’t as well-supported as the MAF cars that followed but tools are available.  These ECMs have the hardware ID “SFI-SD1” Hardware for Tuning QuarterHorse – integrated device brings unique functionality to the table.  It is a “chip […]

Introduction These processors use EDIS coil packs backed by a 36-1 crank trigger wheel, sequential injection for up to 8 injectors, MAF air metering and an electronically controlled 4R70W 4 speed automatic transmission or Tremec 5 speed manual.  These mod motor ECMs speak the standard OBD2 which opens up options for logging using a standard […]

Introduction These processors use a TFI distributor, sequential injection for up to 8 injectors, MAF air metering and an electronically controlled AOD-E 4 speed automatic transmission or Tremec 5 speed manual.  This EEC-IV system became the blueprint for future Ford systems (EECV and beyond) for years to come.  The 94 Mustang with its CBAZA strategy […]

Introduction The Fox Body Mustang switched to using a Mass Air Flow meter to measure airflow in 1989.  Uses TFI distributor, sequential injection for up to 8 injectors, MAF air metering.  This EEC-IV system became the blueprint for future Ford systems (EECV and beyond) for years to come.  Initially hindered by a lack of datalogging […]