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Thread: 1982 Restoration project

  1. #81
    Administrator Ron's Avatar
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    Quote Originally Posted by SupercoolBill View Post
    Took fuel distributor apart again, checked everything,, put it back on the car and tested it. Same issue. Ports #1 & #3 feed fuel all the time. Switched hoses and injectors around. Same thing. Whatever lines are on ports #1 & #3 keep spraying.

    Trying to think what could be causing this. Seems like the following could be causing fuel to spray out of the injectors on #1 & #3:

    1. Injectors are opening at too low of pressure (already disproved this as being the problem)

    2. The spring, shim arrangement on these ports is too strong thus holding the port open.

    3. There is some sort of solid debris on the face of these two ports holding them open.

    4. These ports are somehow damaged (face of port not flat) allowing fuel to pass by when the diaphragm is push up against them.

    When I looked at the ports it did look like at least one of them had a notch in it for some reason.



    Sent from my SM-G970U using Tapatalk
    RE:
    2. I don't remember any shims?? (Check out the 2nd pic HERE.)
    (FWIW, the springs should exert .1 bar, assembled, iirc.)
    3. Four slits partially blocked?
    4. Ya distorted the diaphragm during assembly?

  2. #82
    Senior Member SupercoolBill's Avatar
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    Quote Originally Posted by Ron View Post
    RE:
    2. I don't remember any shims?? (Check out the 2nd pic HERE.)
    (FWIW, the springs should exert .1 bar, assembled, iirc.)
    3. Four slits partially blocked?
    4. Ya distorted the diaphragm during assembly?
    Shims are in your pics. Aluminum washers.

    What is the aluminum circle in this pic???
    Screenshot_20211125-210543.jpg

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  3. #83
    Administrator Ron's Avatar
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    Quote Originally Posted by SupercoolBill View Post
    Shims are in your pics. Aluminum washers.

    What is the aluminum circle in this pic???
    Screenshot_20211125-210543.jpg

    Sent from my SM-G970U using Tapatalk
    I don't see any washers in the pic I pointed to (only "spring cups")...

    If you're asking about the circle that's off center at ~4 o'clock, that is the end of an adjustment screw found only in the adjustable style FD.

    You mentioned six springs, six "spring cups", and 12 shims earlier. I'm wondering if you have a mix of styles...
    The adjustable style should have 6 upper "spring cups" that the adjusting screws push against, 6 springs and 6 lower "spring cups" that rest against the diaphragm.
    (Check out this vid at 11:00, and 11:44.)

    I don't remember the the non-adjustable having upper "spring cups". I could be wrong there, but there are no shims in the parts I have for two non-adjustable FDs I have torn down in my bones box (just looked). (Maybe I've lost them and my mind... ;-)

    When you tear it down again, post pics of what you have.

  4. #84
    Senior Member SupercoolBill's Avatar
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    See attached pics20211126_110546.jpg20211122_171300.jpg

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  5. #85
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    Quote Originally Posted by SupercoolBill View Post
    Jesus loved to party. Just think about it. Almost every good story was when he was at a party.

    Sent from my SM-G970U using Tapatalk
    That's right!
    Shannon

  6. #86
    Senior Member SupercoolBill's Avatar
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    Well, I give up. We tried after more things with no luck whatsoever. Put on the new fuel distributor hoses without the injectors. Ran the fuel pump and pushed the intake disk all the way down to try to flush a bunch of fuel through the distributor. We did this a few times. Then put empty water bottles on the injector hoses. The same thing happened again. The hose for cylendars #1 and #3 constantly feeding a bunch of fuel. Other hoses feeding little or no fuel.

    Took EVERYTHING APART AGAIN. Opened up the fuel distributor AGAIN. Found a tear in o ring on the center tube.

    Looked more closely at the metal diaphragm this time. Noticed dimples on it from it contacting the nozzles. As one might expect there were no dimples on #1 & #3. So this verifies what we were thinking. For some reason these two ports are never closing off. My wife measured everything again. She thought she had it figured out. She swapped around some springs. We put everything back together. Put the distributor on the car and hooked EVERYTHING BACK UP AGAIN.

    Guess what? The same thing happened. Lines #1 & #3 constantly fed fuel.

    We are done...time to get the distributor rebuilt by a professional.

    Anyone ever used Special T Auto for a WUR or fuel DISTRIBUTOR? Their prices are a lot less than anywhere else.
    On a positive note the fuel pressure test kit that I ordered showed up this week.

    20211127_152413.jpg20211127_153452.jpg20211127_163039.jpg

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    Last edited by SupercoolBill; 11-27-2021 at 10:18 PM.

  7. #87
    Senior Member SupercoolBill's Avatar
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    The morale of the story....if you try to rebuild your own fuel distributor DO NOT,....I repeat DO NOT mix up where the springs and shims were located or you will probably never get the distributor to work correctly.
    That little mistake cost us $800

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  8. #88
    Administrator Ron's Avatar
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    Quote Originally Posted by SupercoolBill View Post
    See attached pics20211126_110546.jpg20211122_171300.jpg

    Sent from my SM-G970U using Tapatalk
    lol...I can't count the shims/washers in that pic much less see them very well...

    Quote Originally Posted by SupercoolBill View Post
    Well, I give up. We tried after more things with no luck whatsoever. Put on the new fuel distributor hoses without the injectors. Ran the fuel pump and pushed the intake disk all the way down to try to flush a bunch of fuel through the distributor. We did this a few times. Then put empty water bottles on the injector hoses. The same thing happened again. The hose for cylendars #1 and #3 constantly feeding a bunch of fuel. Other hoses feeding little or no fuel.

    Took EVERYTHING APART AGAIN. Opened up the fuel distributor AGAIN. Found a tear in o ring on the center tube.

    Looked more closely at the metal diaphragm this time. Noticed dimples on it from it contacting the nozzles. As one might expect there were no dimples on #1 & #3. So this verifies what we were thinking. For some reason these two ports are never closing off. My wife measured everything again. She thought she had it figured out. She swapped around some springs. We put everything back together. Put the distributor on the car and hooked EVERYTHING BACK UP AGAIN.

    Guess what? The same thing happened. Lines #1 & #3 constantly fed fuel.

    We are done...time to get the distributor rebuilt by a professional.

    Anyone ever used Special T Auto for a WUR or fuel DISTRIBUTOR? Their prices are a lot less than anywhere else.
    On a positive note the fuel pressure test kit that I ordered showed up this week.

    20211127_152413.jpg20211127_153452.jpg20211127_163039.jpg

    Sent from my SM-G970U using Tapatalk
    I'm with Bitsy, sounds like the nozzles aren't flush with the mating surface.
    If you want, check them with a straight edge and if that is clearly the case, I'll swap heads with you, if you pay the shipping.

    Does your original plate have dimples?

  9. #89
    Senior Member SupercoolBill's Avatar
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    Quote Originally Posted by Ron View Post
    lol...I can't count the shims/washers in that pic much less see them very well...

    I'm with Bitsy, sounds like the nozzles aren't flush with the mating surface.
    If you want, check them with a straight edge and if that is clearly the case, I'll swap heads with you, if you pay the shipping.

    Does your original plate have dimples?
    Ron, sorry is don't have a better pic of the shims. They are basically just little washers, 12 total. None of them look the same as what you posted. What you poated looks like a top hat.

    The old diaphragm has slight dimples but not at prominent as with the new one now.
    Just had a thought. I put bolts in all of the ports to block them to glass beads blast the FD so I wouldn't get any media inside of it. Not all of the bolts were really short like I wanted so I had to stack up sealing washers on those ones. I specifically remember tightening one bolt in and meeting resistance before the sealing washers got tight so I took it back out and added more washers.
    I am wondering if I inadvertently pushed down several of the nozzles. I thought that we checked it with a straight edge but maybe not. So if this is the case the reason that #1 & #3 is feeding when the others aren't isn't because THEY are the issue,...it is because the other nozzles are protruding too far.
    Could this be possible? Could the other ports being "too tightly closed off" be causing the other ports to constantly feed fuel?
    I might have to pop it open one more time. If the nozzles are protruding too far how should I push them back? 1/4" drive socket over the nozzle? Flat surface with some high grit emery paper? Or....just get a new top? Or just send it out to a pro?

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  10. #90
    Senior Member Bitsyncmaster's Avatar
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    I wonder how the nozzles are held in. I would think they have to be sealed real well so suspect they are glued in. I would guess the whole assembly is then surfaced on a surface grinder.
    Dave M vin 03572
    http://dm-eng.weebly.com/

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