Altitude Correction

Depending on altitude, the amount of fuel is changed based on a signal from the altitude correction capsule. With the ignition on or with the engine running, the altitude correction capsule will receive a constant voltage signal (about 5 volts) from the control unit.

If ECU operates in a fixed mode, correction for altitude will not take place. With increasing altitude (decreasing air pressure), the mixture will be leaned for that particular altitude by a reduction of voltage.