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Thread: HELP - Voltage check on AFM 4th wire

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    Guest Adzsy's Avatar
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    HELP - Voltage check on AFM 4th wire

    Can anyone tell me roughly what the 4th wire on the pre face lift afm should have as a voltage.

    It doesn't say in the manual, and it goes to pin 37 on the ecu.

    I know it is a potentiometer to adjust AFR's but mine has previously been fiddled with, and I am trying to figure out what it should be.

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    Guest Adzsy's Avatar
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    Ok. Just in case anyone else is searching. The replacement that arrived today reads 0.346 M Ohms and 5.1v.

    The one on my car when set to 0.346 M Ohms reads 3v.

    I'll update when I swap them over and test drive. Hoping it will sort my hesitation.

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