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ECMlink KOEO code 31

Posted by CJ512, Apr 3, 2020

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  1. CJ512

    CJ512 Probationary Member

    19
    1
    Joined Jun 20, 2009
    Austin, Texas
    I'm getting a code 0031, "knock sensor". Its happening before I start the car, key on engine off. Clear code on ecmlink and it comes back in seconds. Replaced sensor with known good. Checked that the signal wire was making it to the ecu so that's good. Where does the black/ white wire go from the engine harness side? Cant find sh#&. Sanded block to make a better connection. Any help will be appreciated. Thanks
     

    Street Build 180  1

    1991 Eagle Talon TSi AWD
    awd · automatic · 1G DSM
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  2. CJ512

    CJ512 Probationary Member

    19
    1
    Joined Jun 20, 2009
    Austin, Texas
    Oh and I just got the ecu back from ECMtuners a month ago.
     

    Street Build 180  1

    1991 Eagle Talon TSi AWD
    awd · automatic · 1G DSM
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  3. ThunderChild

    ThunderChild Supporting VIP

    2,948
    1,015
    Joined Jan 5, 2012
    Rathdrum, Idaho
    I've been fighting a code 31 since getting my car running years ago. The outer sheath wire is sposed to be grounded to the chassis, as it's a shielded setup.
    Two new knock sensors, no change. Checked all install specs, no change. Ran a new shielded wire and bypassed the stock wiring, no change. Only thing I tried that got me close was from a thread I can no longer find, but I was at my wit's end so I have it a shot. I tied the shielded portion into the signal wire at the ECU connection point. Code went away, and knock sensor seems to read correctly now, but I can't get rid of some strange knock counts in the lower/mid rpm ranges.
    It's annoying enough I have considered changing to a standalone knock sensing system or even changing engine management systems.

    Just my experiences and frustration. This summer I'll be having a friend help me with trying to tune out the knock, but I won't be surprised if it doesn't go away.
     

    Street Build 733  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    710  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 1K  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    2K  0

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 3K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  4. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    5,382
    2,685
    Joined Nov 14, 2013
    Independence, Kansas
    Go to E85 :p
     

    Street Build 4K  29

    1992 Eagle Talon TSi AWD
    14.74 @ 117.04 · 1G DSM

    1K  14

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    755  18

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 1K  7

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 6K  13  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
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  5. ThunderChild

    ThunderChild Supporting VIP

    2,948
    1,015
    Joined Jan 5, 2012
    Rathdrum, Idaho
    If there were any corn pumps around here I probably would! Lol. Best we get is av-gas, otherwise it's 91 or vp race fuel if you wanna drop the coin...
     

    Street Build 733  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    710  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 1K  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    2K  0

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 3K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  6. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    5,382
    2,685
    Joined Nov 14, 2013
    Independence, Kansas
    Same way here. An hour drive to the nearest pump, was just giving the thread some pizzazz.
    5* max timing doesn't bring out the most of my car :(
     

    Street Build 4K  29

    1992 Eagle Talon TSi AWD
    14.74 @ 117.04 · 1G DSM

    1K  14

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    755  18

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 1K  7

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 6K  13  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
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    ThunderChild likes this.

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