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Thread: 3.9 land rover 40L per 100kms please help

  1. #1
    John a Guest

    3.9 land rover 40L per 100kms please help

    Hi I'm new to this forum and wanted to know if anyone has some advice
    I have a 1997 land rover discovery 3.9l v8
    It chews the fuel at 40L per 100kms. New spark plugs leads dizzy cap and button new vacuum lines stepper motor working 28 psi at fuel rail any advice will be greatly appreciated.
    Cheers john

  2. #2
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    So your getting about 200km per tank?

  3. #3
    Join Date
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    Advance the ignition timing to 10 degrees BTDC

    Check the value of the ECU temp sender when hot, should be around 300 ohms. Plug looks like an injector plug just behind the thermostat housing.

    Check the fuel pressure regulator isn't leaking fuel into the manifold via its vacuum hose.

    Clean or replace your MAF with a known good one.

  4. #4
    John a Guest
    Quote Originally Posted by Vern View Post
    So your getting about 200km per tank?
    Hi Vern yeah that's exactly right 200kms per tank it's doing my head in

  5. #5
    John a Guest
    Hi bee utet
    Haven't checked timing as yet, I'm going to check temp sender in the morning, fuel pressure regular is working ant not leaking same with the MAF sensor any other suggestions ?

  6. #6
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    Quote Originally Posted by John a View Post
    Hi bee utet
    Haven't checked timing as yet, I'm going to check temp sender in the morning, fuel pressure regular is working ant not leaking same with the MAF sensor any other suggestions ?
    Check your brakes arent binding!

  7. #7
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    Check the vacuum advance, pull the vac hose off the intake manifold and suck on line. If you can suck air through the line the vac advance unit will need to be replaced, this is bolted to the side of the distributor.
    Also the temp sender will cause the same problem.

    Mocky.

  8. #8
    Join Date
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    maf,
    "How long since you've visited The Good Oil?"

    '93 V8 Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to '21
    '16.5 RRS SDV8
    '21 to Infinity and Beyond!


    1988 Isuzu Bus. V10 15L NA Diesel
    Home is where you park it..

    [IMG][/IMG]

  9. #9
    PTC Guest
    It sounds like you have my old Nissan Patrol engine under your bonnet. I was getting figures like that so i bought my new Defender to replace it.

  10. #10
    John a Guest
    checked the brakes they are fine, the coolant temperature sensor was 320ohms at running temperature, is that normal? Any other suggestions would be highly appreciated as it is doing my head in

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