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Originally Posted by Abusch  I just spent an hour GOOGLING this question and it appears that this engine does have a knock Sensor. In fact, several sites say that ALL modern electronic controlled engines have Knock Sensors, as it not only controls engine knock, but is a big part of the emission control system. |
I think you answered the question, there is no Knock Sensor. However, that doesn't mean Knock is not inferred by other sensors by the PCM. This is like coolant temperature is inferred by the PCM by the head temperature sensor in my FEH. Ford wants to eliminate as much wiring and sensors due to cost. The PCM (computer) can be programmed to determine knock with other sensors and adjust timing accordingly in the 3.0 V6.
Does the FEH have a coolant temperature sensor? No, it's inferred by the head temperature sensor by the PCM.
Just like the O2 sensors don't give the CAT temp, but the PCM can determine that the Light-Off of ~550 degrees is okay for closed-loop. It's all inferred by the PCM based on readings of the O2 sensors.
