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Thread: 3.5V8... I think I may have an issue somewhere...

  1. 26th September 2012, 09:51 AM #1
    Zen's Avatar
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    3.5V8... I think I may have an issue somewhere...

    Hi Guys,
    I searched the forum for 3.5v8 Fuel economy and such related threads, but none of the reported MPG or KPL figures seem to match the ones im getting.

    65ltrs Petrol = 230kms

    Thats 28ltrs per 100kms...

    Now, the thing I dont understand, is with those kind of figures, something is obviously wrong, but, the engine runs perfectly, idles perfectly, plenty of power, no wrong sounds or smells or vibrations.

    Half of those kms where done with 33'MTZs and the other half with the stock Landrover size tyres (whatever that size is 29' or something)

    Ideas?
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  2. 26th September 2012, 10:05 AM #2
    d@rk51d3 Guest
    No leaks in the fuel line?

    I was getting 30/100 on lpg, but am getting about 18/100 on petrol.
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  3. 26th September 2012, 10:09 AM #3
    Zen's Avatar
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    Quote Originally Posted by d@rk51d3 View Post
    No leaks in the fuel line?

    I was getting 30/100 on lpg, but am getting about 18/100 on petrol.
    No Leaks that I can see, oil or petrol. Im baffled, the air filter is new, new plugs, new leads, doesnt blow any smoke whatsoever.
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  4. 26th September 2012, 10:13 AM #4
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    Is this just a one off or is this the normal for your vehicle. Try several tanks worth of fuel with just the standard size tyres to get an idea of what the base is for your vehicle. Were you playing offroad with the 33's as that will nearly always use more fuel.
    98 Harvey the tractor - 300 tdi Defender Wagon
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  5. 26th September 2012, 10:34 AM #5
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    Quote Originally Posted by GuyG View Post
    Is this just a one off or is this the normal for your vehicle. Try several tanks worth of fuel with just the standard size tyres to get an idea of what the base is for your vehicle. Were you playing offroad with the 33's as that will nearly always use more fuel.
    Its the first full tank I have run through the disco, I did one hill climb and one bog hole, (about 10klms worth including driving to the bush and home)

    then the other 220klms was all highway.
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  6. 26th September 2012, 10:42 AM #6
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    Could be worth checking you vacuum advance on the distributor is working properly
    Nick
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  7. 26th September 2012, 10:47 AM #7
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    Quote Originally Posted by Nick S View Post
    Could be worth checking you vacuum advance on the distributor is working properly
    Nick
    Cheers Nick, ill put that on the list of things to check, Thats something I probably wouldnt of thought of.

    Cheers.
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  8. 26th September 2012, 10:48 AM #8
    MR LR
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    Go into the bathroom, grab the scales and weigh your right foot, that could have a lot to do with it, especially running 33" muddies
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  9. 26th September 2012, 11:09 AM #9
    mike 90 RR Guest
    Quote Originally Posted by Zen View Post
    Thats 28ltrs per 100kms...

    Ideas?

    1: Check that the vacuum advance works
    2: Check the resistance of the "EFI motor temp sender unit" is within Hot n Cold (resistance) specs
    3: Clean the MAF "hot wire"
    4: Shove a Bottle of injector cleaner in the fuel tank
    5: Check for the amount of "Slop" (degrees) of the cam chain

    That'l keep you busy for a while


    Cheers
    Mike
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  10. 26th September 2012, 11:55 AM #10
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    Quote Originally Posted by mike 90 RR View Post
    1: Check that the vacuum advance works
    2: Check the resistance of the "EFI motor temp sender unit" is within Hot n Cold (resistance) specs
    3: Clean the MAF "hot wire"
    4: Shove a Bottle of injector cleaner in the fuel tank
    5: Check for the amount of "Slop" (degrees) of the cam chain

    That'l keep you busy for a while


    Cheers
    Mike
    Well thats a days worth of stuff to do, cheers guys, Ill get onto this list on saturday, and let you all know how it goes.
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