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Thread: Was the 3.5 ever efi as I cant work out if I have a 3.9 efi. Its 91 2 door

  1. 26th May 2022, 03:00 PM #1
    gasman
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    Was the 3.5 ever efi as I cant work out if I have a 3.9 efi. Its 91 2 door

    What he said
    1991 2 door Disco (current)
    2012 Puma ute
    2007 D3
    1976 2 door RR
    1977 2 door RR
    1972 FORD XY 4X4
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  2. 26th May 2022, 03:10 PM #2
    DeanoH
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    My '86 RRC had 3.5 litre EFI engine.

    Deano
    66 SIIA SWB .......73 SIII LWB diesel wgn
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  3. 26th May 2022, 03:33 PM #3
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    4bee
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    Quote Originally Posted by gasman View Post
    What he said

    That shouldn't be too hard to work out, does it have a Carbie, (or two) or the rest of the EFI Gubbins? Air Flow Meter, Injectors etc etc? Familiar with the 3.9 but not the 3.5 but it shouldn't be all that much difference.

    My 1995 3.9 had "3.9" cast into the top of the central air Intake Plenum but that could have been a later addition.
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  4. 26th May 2022, 03:38 PM #4
    PhilipA
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    The 3.5 Disco had the same 14CUX as the 3.9 RRC.
    AFAIK everything was the same including the injectors.
    Regards PhilipA
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  5. 26th May 2022, 04:07 PM #5
    gasman
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    Yes its efi with the plenum on top but is not bad on power. Ive had 2/ 2 door rangies in my past and they've been dogs, thats why I asked.
    Its also on gas but efi.
    WTF goes on there
    1991 2 door Disco (current)
    2012 Puma ute
    2007 D3
    1976 2 door RR
    1977 2 door RR
    1972 FORD XY 4X4
    + 70 other vehicles and trucks
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  6. 26th May 2022, 05:43 PM #6
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    Rick1970
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    Quote Originally Posted by gasman View Post
    What he said
    91 disco had the 3.5 efi, from factory anyway.
    '93 D1 V8 auto
    '93 D1 200Tdi 2-door, ARB's, MD transfer, sill tanks, winch, 2"lift.......
    '95 D1 V8 auto......gone
    '86 V8 RRC.....gone
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  7. 26th May 2022, 07:29 PM #7
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    Slunnie
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    I thought all Discos were EFI.
    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~
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  8. 26th May 2022, 08:28 PM #8
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    Rick1970
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    Quote Originally Posted by Slunnie View Post
    I thought all Discos were EFI.
    They were
    '93 D1 V8 auto
    '93 D1 200Tdi 2-door, ARB's, MD transfer, sill tanks, winch, 2"lift.......
    '95 D1 V8 auto......gone
    '86 V8 RRC.....gone
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  9. 27th May 2022, 06:15 AM #9
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    Homestar
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    Yep, the early EFI engines were 3.5’s. The Rangie went from carby to flapper EFI in 86. A 91 should have the 14CUX EFI but I’m not sure what year they went from the 3.5 to the 3.9
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
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