ALM 1.6i rich mixture

Discussion in '8-valve' started by dogzila, Feb 9, 2019.

  1. dogzila Forum Member

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    VAG Ibiza III 2000 with engine ALM 1.6i 55kw. I can't pass MOT inspection because of rich mixture CO 10%, Lambda 0,7.
    Before changing fuel pump (which was bad) and with disconnected lambda MOT inspection showed CO 6%, Lambda 0,8. VCDS shows no engine faults. What can cause so rich?
     
  2. rubjonny

    rubjonny Administrator Admin

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    Oct 31, 2003
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    cycle thru the ecu measuring blocks next, make sure all the sensor inputs are showing good values. maybe check the fuel injectors and fuel pressure regulator?
     
  3. dogzila Forum Member

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    Sep 25, 2008
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    Fuel pressure normal 2,5bar, without vacuum 3bar. Lambda shows 0,1V. I will try change it
     

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