MOTORCRAFT EEC Ignition Systems: Description

In 1980 two Electronic Engine Control (EEC) systems are used. The EEC II system is only used on a small number of Ford and Mercury models with 351" V8 engines (approximately 25, 000 vehicles). The EEC III system may be used on any of the V8 models except the Versailles.

CAUTION: Different diagnostic and service procedures are required for EEC II and EEC III. To identify the EEC II vehicles, look for (1) silver engine decal rather than gold tone used for EEC III, (2) red vinyl tag near EEC module connector, marked "EEC II", (3) a paper tag on rear of calibration assembly, marked "GA" or "K" for EEC II, and (4) on EEC II vehicles, the calibration assembly does not fill out the mounting area on the processor assembly.

Fig 1: EEC Distributor Components (Early & Later Designs)

Courtesy of FORD MOTOR CO.

The system consists of an Electronic Control Assembly (ECA), Calibration Assembly, Dura-Spark III ignition module (Dura-Spark II ignition module is used with EEC II), 7 engine sensors, ignition coil, a special distributor (no pick-up coil, armature, or vacuum/mechanical advance systems). All engine timing is controlled by the ECA, which receives information on engine and atmospheric conditions for various engine sensors. The ECA is capable of firing the spark plug at any time from TDC to 50° BTDC.

NOTE: Two different distributors are used. Some 1980 351" engines will use the early design distributor. See Figs. 1 and 9. The later design may be used on any V8 engine except Versailles models.