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yo i checked it out in my FSMs and it says that the input to the ecu from KNK1 and KNK2 is a negative sourced reading but there is a resistor in the circuit with it. im not sure about the resistance, i believe it varies with engine speed. from what i see, it could possibly be the same as an oxygen sensor. if i were you i will attempt reading the resistance while the car is going without high boost, justfind the resistance that you need and work from there. it is definitely a negative reading though.
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