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Old 06-21-2012, 03:34 AM   #1
Butcher240sx
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Join Date: Oct 2010
Location: Houston Texas
Age: 40
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Knock sensor bypass how to:

I've seen a lot of bad knock sensors lately. Here you go.
I just tested my knock sensor today and found it to br dead. No resistance at all. I pulled a code for a bad knock sensor. My car wasn't pulling hard before 5K rpm. The new one is $200 and a pain in the ass to change, so i decided to bypass it. The ECU sends the sensor 5VDC and returnes 2.5VDC. So you need about .56M ohm or 560k ohm.
I went to radioshack and bought a pack of 100k and a pack of 47 k resistors. i wired 5x100k and 1x47k in series and 2x47k in parellel and that gave me exactly 560k ohm. I then disconnected the harness and plugged the resistor pack into the ecu side harness. I reset the ecu and went for a drive. With a 3degree timing bump and this delete, my car pulls hard and smooth. I only run premium gas so I don't think detonation will be an issue.

Ka24,ka24de,ka24de knock sensor delete, ka knock sensor delete,
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