ABF Lambda question when hot

Discussion in '16-valve' started by Gman2oo6, Jun 24, 2020.

  1. Gman2oo6 New Member

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    Ok cannot figure this one out

    Replaced my lambda ( original OEM ) because of high fuel consumption ( 55 litre on 400km )
    also because the car will fall out when it is hot it drops to 400 rpm and then jumps op again
    now what is really strange is when i disconnect my lambda all is fine it runs like it has to do
    but i think it runs in save ranges the ECU provide the car to run with

    But why does it do this when i reconnect my lambda and only when the lambda starts to work ?
    in cold start all is fine
     
  2. Savagesam

    Savagesam Moderator Staff Member Moderator

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    Did you buy a decent OEM quality part? I've not had any luck with anything other than Bosch on my VW's
     
  3. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    When you disconnect the HEGO, the fuel mixture defaults over 10% richer.
    This suggests either your HEGO is not compatible with the ECU or you have an air leak.
    Regarding your original problem, I suspect you have other maintenance issues.
     
  4. Gman2oo6 New Member

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    Original Bosch 0 258 003 584 Lambda is in it
    air leak test i did it with brake-cleaner
    spaying it when the engine runs no fault there

    Maintenance issues ?
    All that could be replaced is done with OEM parts
    All sensors , All filters , All liquids ,Spark-plugs , timing-belts , Chain , Hoses , .....so all you can think off
     
  5. Gman2oo6 New Member

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    hmmm with the Lambda disconnected it now starts to do the same less heavy as with lambda .
    down to 400 rpm hiks 2 times and then settles at 750 rpm
     

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