General

MPI System Inputs And Outputs:

OPERATION
The MPI electronic control unit (ECM) processes input signals, filters out stray signals and sends the results to the operating components of the fuel injection and ignition systems.
The ECM also provides for self-diagnosis of the MPI system. The MPI system is adaptive or self-learning. The ECM learns continuously by using a sophisticated feedback system to constantly readjust the various basic control settings. These values are then stored in its electronic memory.
The adaptive capability allows the ECM to compensate for changes in the engine's operating conditions, such as altitude changes, intake leaks or other deviations.
If the vehicle battery or MPI ECM is disconnected, the vehicle must be driven for a few minutes so the MPI unit can "re-learn" its operating conditions.