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ecu pin number for lambda signal

Discussion in 'A4/S4 forum(B5 Chassis)' started by sam80quattro, Sep 2, 2011.

  1. sam80quattro
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    sam80quattro Member

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    [Sep 2, 2011]
    this is 1 for the ecu converting folk :D

    my aeb is running with t28, vr6 maf, AGU ecu, etc.
    when checking vagcom for faults as there was a flat spot midrange i kept getting faults for the lambda sensor,
    so as i had an aem wideband gauge i decided to simply unplug the oem narrowband lambda and install the aem in its place.
    WOW the car has transformed again, so im assuming it was a faulty lambda and by unplugging it its altered the fueling, its now (as i expected) rich as hell on idle, stoich with my foot down coming onto boost then 12.5 on full boost, cruising is rich too so i plan on using the aem uego's narrowband simulator so hopefully the ecu sorts the fueling out on idle and cruising, my problem is im not 100% sure which wire i should be connecting the aem too, im assuming its pin 26 on the ecu (the same for agu as it is aeb?) any help would be great.
    thanks
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  3. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Sep 2, 2011]
    so you are going to use the aem gauges narrowband output to run the ecu off?
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  4. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Sep 3, 2011]
    Sounds like a good idea!

    The lambda is connected across 25 and 26. One will be ground and the other will be the signal, you'll need to see which is which.
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  5. sam80quattro
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    sam80quattro Member

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    [Sep 7, 2011]
    yep ecu will be running the off the aem, saves having to weld another boss in and obviously buying a new lambda lol
    will the earth from 25/26 need grounded or just leave it disconnected? ill get digging and find which 1 is which. cheers
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  6. sam80quattro
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    sam80quattro Member

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    [Sep 25, 2011]
    it was the violet wire incase anyone is interested and works spot on :D
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