LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 1987 >> DL 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Operation >> Electronic Control Module (ECM)
October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Electronic Control Module (ECM)

ECM receives signals from O2 sensor, thermosensor and engine speed sensor to adjust Air/fuel ratio to proper level.

Air/fuel ratio is judged to be rich when voltage produced by O2 sensor is higher than a set specified level. As a result, ECM signals duty solenoid to pass a greater quantity of air into carburetor. This additional air leans air/fuel mixture.

Air/fuel ratio is judged to be lean when voltage produced by O2 sensor is lower than a set specified level. As a result, ECM issues signals to duty solenoid to pass a less air into carburetor. The elimination of air enriches air/fuel mixture.

scientia non olet · About LEMON Manuals