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VT running rich after service

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by DeathSammich, Aug 7, 2017.

  1. DeathSammich

    DeathSammich Member

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    My series 1 VT was running rich for a while using 15L per 100 so I changed the o2 sensors to Brand new ones and it's still using 15L per 100. I'm not sure what to do. It has 280xxxKms on it and I've ordered a coolant temp sensor and also have a fuel injector service kit ready to go. What else could possibly make my economy so bad?
     
  2. BlackVXGTS

    BlackVXGTS Well-Known Member

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    It might help if you provided some information on how you determined the 15l/100km - trip computer or calculated via petrol pump/odometer info? Also what type of driving - city, country, stop-start, mixed (approximate percentage of each)?
     
  3. DeathSammich

    DeathSammich Member

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    It says it on the dash cluster, also tank is nearly empty after doing 80kms with 20 litres petrol. It's just general all over driving. City or not I don't think it should use 15-20l per 100
     
  4. gossie

    gossie Well-Known Member

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    New air filter?
    New plugs?
    New fresh correct oil, inc. oil filter?
    Tyres pumped up close to 40PSI?
    Clean car....Clean polished car is more slippery.

    Just a couple of things that help economy.
     
  5. DeathSammich

    DeathSammich Member

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    Have new spark plugs, drained and put in 20w60 penrite, tyres pumped up, changed oil filter, fuel filter, replaced fuel pump
     
  6. DeathSammich

    DeathSammich Member

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    And air filter has been changed, MAF sensor cleaned
     
  7. lout

    lout Well-Known Member

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    which engine do you have
    sedan or wagon
    you need to fill fuel to first pump shut off
    write down odometer reading
    when tank is nearly empty
    go to same fuel pump and again fill until first pump shut off
    write down odometer reading and litres of fuel used
    then calculate your usage
    dont rely on the cluster estimate
    have you disconnected battery or pcm fuse to reset fuel trims
    have you tested/changed tps
    last but not least do you drive like a p plater or like an adult
     
  8. DeathSammich

    DeathSammich Member

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    I'll try filling it and counting. I've been counting it when putting 20 litres in it and seeing how long it lasts.
    I've disconnected the battery but haven't pulled any fuses.

    And I drive like a grandpa to conserve fuel
     
  9. DeathSammich

    DeathSammich Member

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