Enrichment on PRE-IGNition (Premature Ignition, Pinking)

Enrichment on PRE-IGNition (premature ignition, pinking)





Description

Combustion in the engine is monitored continuously by the DI/APC control module. When the control module records pre-ignition in any of the cylinders, a signal is sent to the LH system's control module. This signal orders immediate fuel enrichment.

The signal from the DI/APC control module is applied to pin 20 (LH 2.2) and pin 28 (LH 2.4, 2.4.1 and 2.4.2).

Note: PRE-IGNition does not normally happen with- out being preceded by pinking. This means that adjustment of the timing and boost pressure takes place if pinking occurs. If PRE-IGNition occurs as well, enrichment of the fuel-air mixture will take place.

Useful tip
In certain cases this function has given rise to malfunctioning and may therefore be disconnected. On later model year cars this function is not provided.