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Thread: MFI prime?

  1. 12-30-2014, 10:59 AM #1
    Orange71S
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    MFI prime?

    Guys,
    I have a 71 S that I am desperately trying to reassemble. I plan on putting the engine back in this week.
    Before I put the engine/trans back in, does the MFI need to be primed with gas or oil?
    Or, will the fuel and oil pumps take care of this?
    Thanks much!
    Jay Yost

    1946 Willys Army Jeep
    1956 356A Cab
    1957 356A Speedster
    1959 Austin-Healey Sprite
    1963 356B Notchback
    1969 911T 'Speedster'
    1971 911S
    1974 Ford Ranchero
    1986 911 Carrera Cab
    1993 Audi V8Q
    2001 Mazda Miata 'Daughters Car'
    2008 Audi S6
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  2. 12-30-2014, 02:16 PM #2
    Curt Hammill
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    You should not need to prime the oil or fuel. You should check the timing of the MFI pump and I always crank over a new motor with out the plugs installed until you have oil pressure.
    Good luck
    Curt Hammill
    911S#2032
    http://www.linkedin.com/pub/curt-hammill/38/347/849

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  3. 12-30-2014, 04:08 PM #3
    edmayo
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    And be sure to ground the high tension lead from the coil so the spark doesn't try to jump internally some where.
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    Fort Worth Tx.
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  4. 12-31-2014, 01:22 AM #4
    Alan.uk
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    Hi Jay, if it's all fresh I do put oil in the MFI pump. Also if the fuel system is all fresh run the pump and also crack off the air bleed on top of the filter housing. You will see a small screw head on the top. It is slotted at the bottom so you don't need to fully take it out, just undo it a few turns. This releases the air trap which forms there.

    HTH

    Alan
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  5. 01-02-2015, 05:54 AM #5
    Orange71S
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    All good info!
    Thanks Much!
    Jay Yost
    1946 Willys Army Jeep
    1956 356A Cab
    1957 356A Speedster
    1959 Austin-Healey Sprite
    1962 356B Notchback
    1969 911T 'Speedster'
    1971 911S
    1974 Ford Ranchero
    1986 911 Carrera Cab
    1993 Audi V8Q
    2001 Mazda Miata 'Daughters Car'
    2008 Audi S6
    2018 Panamera 4S 'Wife's Car'
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  6. 01-07-2015, 04:15 PM #6
    Curt Hammill
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    Did you get your motor running?
    Curt Hammill
    911S#2032
    http://www.linkedin.com/pub/curt-hammill/38/347/849

    1969 911E 2.5ss twinplug
    http://www.911e.org/microsite.php?119200483

    1997 993C2s

    Audi 1983 groupB rally tq-sport
    http://www.1-buc.de/site/content/2_news_1006.html
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  7. 01-08-2015, 08:22 AM #7
    Orange71S
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    Curt,
    Thanks for your interest, but no....not yet. Maybe next week....or the week after that.....
    Thanks Much!
    1946 Willys Army Jeep
    1956 356A Cab
    1957 356A Speedster
    1959 Austin-Healey Sprite
    1962 356B Notchback
    1969 911T 'Speedster'
    1971 911S
    1974 Ford Ranchero
    1986 911 Carrera Cab
    1993 Audi V8Q
    2001 Mazda Miata 'Daughters Car'
    2008 Audi S6
    2018 Panamera 4S 'Wife's Car'
    Reply With Quote Reply With Quote
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