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Thread: 1973 240z fuel pump where does it mount?

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    Default 1973 240z fuel pump where does it mount?

    Hello, it has been about a year since my last post. This car I bought was completely disassembled when I bought it. I am slowly getting it back together and I am not able to figure out where the fuel pump mounts to. There are two sets of holes going through the trunk area and it does not fit there and there are two holes going through the frame and it does not fit there. I have looked for photos of an original and have not been able to find any. I hope someone can show me a picture and help me out. Thank you for your time.
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    http://www.classiczcars.com/forums/e...fuel-pump.html

    Don't know if this helps, but found this picture.
    Original Owner/1971 240Z
    Gold Medallion/First place Stock Class/2012 ZCON

  3. #3
    Registered User Stanley's Avatar
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    Click image for larger version. 

Name:	Stock electric FP.jpg 
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ID:	69702Not very photogenic, guess I take pictures of everything.

    I took it off to paint it, put new hoses, clean the contacts, etc., but after installing a fuel pressure gauge decided it didn't need it. The mechanical FP is OK. Just have an extra fuel filter there now.

    Removing the electrical connection on the side of the pump to clean it was a mistake, it was well sealed and the contacts were clean, it's hard to remove the cap that covers it without damaging it.

    I might reinstall it with an inline on/off switch, and without hooking up the hoses in case the mechanical FP goes out on the road, or maybe just keep a spare mech. FP in the car.

    The bracket connects to the frame behind the right rear wheel.
    Last edited by Stanley; 02-09-2014 at 12:47 PM.

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    Barn Find Daily Driver Captain_Zeros's Avatar
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    On the right edge of Stanley's picture is the passenger side end of the moustache bar diff mount, if you need a little more context.
    1973 240Z w/ roundtop carbs, 280zx e12-80 distributor, 280zx alternator, late model Altima junkyard electric fans. 115 Blue Metallic & white side stripes.

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    Thank you so much. The photo is zoomed in so much it is hard for me to know exactly how it mounts. It does look like it mounts to a bracket and then to the frame. I think the bolt above the Phillips screw is the one I see in the photo I have. Thanks again, I am going to look for a bracket like I see in your photo, I might have it.

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    Registered User kats's Avatar
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    Hi, I did not know 1973 240Z has a electrical fuel pomp,that is a
    exactly same of Z432 from the beginning of production 10/1969 .And some of Japanese
    S30s which is equipped factory installed air conditioning system has the pomp too from the beginning of production .
    See this thread for more pictures at post #185.
    http://www.classiczcars.com/forums/o...dy-z432-2.html

    Kats
    Last edited by kats; 02-09-2014 at 07:34 PM.
    Katsuhiko Endo
    1970 DATSUN 240Z
    HLS30-02156 (03/70)
    L24-005562

    1970 FAIRLADY Z432
    PS30-00088 (01/70)
    S20-000884

    1972 DATSUN 240Z
    HLS30-60213 (12/71)
    L24-072419

    JAPAN
    Welcome to my web site,
    http://www.geocities.jp/datsunz903

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    Barn Find Daily Driver Captain_Zeros's Avatar
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    Quote Originally Posted by kats View Post
    Hi, I did not know 1973 240Z has a electrical fuel pomp,that is a
    exactly same of Z432 from the beginning of production 10/1969 .And some of Japanese
    S30s which is equipped factory installed air conditioning system has the pomp too from the beginning of production .
    See this thread for more pictures at post #185.
    http://www.classiczcars.com/forums/o...dy-z432-2.html

    Kats
    Not all 1973 240Zs had the electric pump right from the factory, they retrofitted them at the dealer in response to vapor lock problems with the flat top emissions carburetors. Most of them have them, but there is a lot of variation due to being dealer installed typically. For instance my 1973 Z had the fuel pump installed and mostly wired up, but there was never any relay in place to turn the pump on!

    Attached is the dealer bulletin that explains what was involved in the retrofit kit and how to respond to angry customers with vapor lock, pretty interesting stuff.
    Click image for larger version. 

Name:	1973 240z 1974 260z fuel system modifications.pdf 
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ID:	69706
    1973 240Z w/ roundtop carbs, 280zx e12-80 distributor, 280zx alternator, late model Altima junkyard electric fans. 115 Blue Metallic & white side stripes.

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    Registered User Stanley's Avatar
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    Wow Captain, never saw that bulletin before. Never knew there were two kind of flat tops. And good news for dual point distributor sufferers. Now you know how to set the points in just a few hours!

    Now I can finally tell if I've got the relays for Jidosha Kiki. Never could hear it running, even from up close but it seemed to have all the wires. Hooked it to the battery when I took it out, it ran good. So who knows. Thanks for posting.

    Kats, was that FP on the Z432 for performance? Maybe I'll put mine back on!

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    I found the bracket and know exactly how it goes in, thank for your help.

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    No more body roll! SteveJ's Avatar
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    Quote Originally Posted by Stanley View Post
    Wow Captain, never saw that bulletin before. Never knew there were two kind of flat tops. And good news for dual point distributor sufferers. Now you know how to set the points in just a few hours!

    Now I can finally tell if I've got the relays for Jidosha Kiki. Never could hear it running, even from up close but it seemed to have all the wires. Hooked it to the battery when I took it out, it ran good. So who knows. Thanks for posting.

    Kats, was that FP on the Z432 for performance? Maybe I'll put mine back on!
    Here's a link to the file if you want it. http://xenons30.com/files/1973%20240...ifications.pdf
    73 240Z
    74 260Z

    Blue's collection of tech tips - A great place to look for answers
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    Hi Captain,
    I saw the book on eBay a few times before but
    I have never seen inside of it .The flat top SUs do
    not have good reputation in the US maybe
    Japan too I think.All 1973 Fairlady Z series(except Z432) have the SU, but less
    emmision mechanism comparing with the US models.

    Stanley ,Z432 have the FP as standard, for performance ?
    Yes I think so.
    S20 engine is designed like that from the beginning,
    engineers of former Prince motor company put all electrical ignition system
    For 3 twin choke carbs and the FP , all in all they wanted
    to do their best for S20 engine's stability at high revolution
    to produce max power.
    As a side note, S20 engine does not have a
    return fuel line to the fuel tank.
    Nor any emmision system, so the model Z432 and
    Skyline GTR were dropped from the fleet
    in 1973 , the time began emission control spread
    all over the world.
    Only 2 or 3 Z432 were made in 1973, the last one
    is PS30-100008 Feb 1973.

    Kats
    Katsuhiko Endo
    1970 DATSUN 240Z
    HLS30-02156 (03/70)
    L24-005562

    1970 FAIRLADY Z432
    PS30-00088 (01/70)
    S20-000884

    1972 DATSUN 240Z
    HLS30-60213 (12/71)
    L24-072419

    JAPAN
    Welcome to my web site,
    http://www.geocities.jp/datsunz903

  12. #12
    Registered User Stanley's Avatar
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    I get the feeling Nissan engineers must have been pulling out their hair in 73, ordered to fix something that wasn't broken. That adjustment procedure for the dual point distributor is just nuts.

    My '73 doesn't have a return (or a dual point distributor)either (anymore) , and it's doing just fine.
    Last edited by Stanley; 02-10-2014 at 08:54 PM.

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