MEFI Fuel Injection
Knock Sensor (KS) & Module
MEFI 1
The knock module is used in the MEFI 1 systems. During no knock conditions it sends an 8-10 volt signal to the ECM. When knock is detected it will remove the signal from the ECM. The ECM will then retard the timing as much as 10%. The knock system was fully incorporated into the ECM with the introduction of the “WT” models equipped with the MEFI 3 system. All MEFI 3 and 4 systems have a knock system built into the ECM.
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