Adaptations

Adaptations:

The correction values stored in the control unit should only be used as additional Information In the case of acute engine problems.

The correction values stored in the control unit can be of assistance in the case of acute engine problems.

If the set range is exceeded in the negative direction, the air-fuel mixture will be too rich and the DME attempts to adjust the mixture, i.e. make it leaner.

Reasons for an excessively rich mixture:

- Injector valves leaking

- Fuel pressure too high

If the set range is exceeded in the positive direction, the air-fuel mixture will be too lean and the DME attempts to adjust the mixture, i.e. make it richer.

Reasons for an excessively lean mixture:

- Leaks in intake or exhaust system (ahead of oxygen sensor). The oxygen sensor measures the additional oxygen and signals to the DME that the mixture is too lean.

- Hot wire in the HLM defective (load signal too low). The mixture is too lean.

The adaptation values are forgotten (lost) when the voltage supply to the DME is interrupted. This can lead to problems in the starting and idling. Depending on how far the adaptation values have deviated from the basic values, some time will be necessary until the adaptation values are releaned.

For this reason, idle operation or test runs are of little use in order to observe the change In adaptation values.