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  • terrible fuel consumption

    Hi - a rookie hoping for some pointers on a fuel consumption problem. I recently bought a 2004 v6 automatic with 87k on the clock, and from the comments here I was expecting fuel consumption in the range of 15-20l/100km. I live in Amman, which is a very hilly city, and all my driving is short city trips in relatively heavy traffic, but I'm not heavy-footed. The last time I refueled, I got less that 400km from 100 litres (using 95, although fuel quality can be an issue here). I haven't heard of anyone else using 25+ litres/100km, so I'm wondering whether I might have an issue with the engine/fuel system. It was serviced recently (new fuel/air filters, spark plugs, oil change), tyre pressure is at 39psi, and it's not an over-tight handbrake. I had a look at the MAF sensor and the wires looked clean to me. Power is fine, although there is sometimes a lag between 1000-1500 revs in low gear. Very grateful if anyone has any ideas what could be causing such poor performance?

    Cheers,

    Charlie

  • #2
    Manual / Auto.
    What size tyres?
    Loaded up or empty car?
    Any accessories, Roof racks, Bar, Winch etc.?

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    • #3
      Hey Charlie

      I have a 05 120 V6 auto with 80ks, also just had major service a while back and have been finding the car a bit sluggish and also getting some chugging/vibration in 5th gear at around 60-70kmh with a little load (almost like a wheel wobble). Got our workshop to put some injector cleaner through it and gave it a burn and it's as good as gold like it was when it was new. Got it's get up and go back. The fuel consumption hopefully will improve as a result of this also.
      I think it was a Wurth's product. Give it a go as I think you will find it will help. They also cleaned the MAF sensor after I cleaned it with the spray, they clean it with some ultrasonic cleaner I think and they said it was pretty grubby.

      Hendo66 in Oz.

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      • #4
        it's a 4 speed auto, no mods or accessories, or roof rack, and mostly just me and the missus for weight. the tyres are 265/65 r17. I was hoping it might be clogged injectors as that should be pretty simple to fix, but the fact that the power seems to be pretty normal had me worried it might be something else. Thanks for the replies. C

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        • #5
          Hmm that's really high for standard tyres and no heavy bits..

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          • #6
            Charlie

            -Look for signs of a blocked Catalytic Converter.
            -Also Oxygen sensors start being faulty and operate out of range.

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            • #7
              Thanks for the tips guys - will re-post hopefully once I've found what the problem is. C

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