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Thread: Astra MK1 1997 1.7 TD estate

  
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    Astra MK1 1997 1.7 TD estate


    Hi,
    Does anyone know why my astra estate 1.7td is short on MPG, some say that the car should return around 45MPG but my car is doing around 36MPG.

    The car is serviced at my local garage and I can see no leakage so what needs to be done to get the MPG back up.

    Thanks
    Delinc

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    MatG's Avatar
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    Hi I have moved your thread to the correct forum
    Been apart of the inner circle since 2001
    Click Me to Join Astra Owners Club Full or Lite Members

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    what sort of journeys are you doing?

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    1.7td mpg

    some short but mostly used for work, 70 miles round trip and on a 50|50 basis, single and duel carriageways. A tank lasts for around 420 - 440miles.

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    Hi delinc,

    If that's a 1997, surely it's an MK3 isn't it? And can you tell us whether its a GM or Isuzu? Do feel that the mechanics at your local garage are thorough and know enough about your car's engine?

    Anyway, as a start, you could replace the fuel filter and air filter to make sure fuel and air flow aren't restricted. You could inspect and clean the EGR valve (and possibly deactivate it by plugging the vacuum line). On my old X17DTL with the EGR valve out I could see a build-up of crud in the intake manifold and that should be thoroughly cleaned out sometime as it is a restriction. You could have the injectors serviced (want the best possible spray pattern) or at least try using some injector cleaner additive. Other than that I guess make sure your wheels are balanced and alligned, and tires are always properly inflated.....

    And just thought I would add that 420-440 per tank (mixed) really isn't too bad at all

    Cheers, Paul

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    Hi,
    Its an Isuzu engine and has been serviced but next time into garage I will get the EGR and the filters etc done and hopefully that may help.

    Thanks
    Delinc

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    I thought that model had a 10 gallon tank. If so 440 miles per tank is 44mpg

    T

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    Hey pewseyfam just looked it up in TIS 2000, says :estate 50L (11.0 british gallons)

    so 420-440 miles is 38-40 mpg

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