What is this part?

Discussion in 'Technical' started by mike75mav, Jan 16, 2010.

  1. mike75mav

    mike75mav Member

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    I have a 75 mav with a 250 and I'm figure out all the vaccuam hose connections and I have this one part I don't know what its is. Is this a solenoid vacuum value? Is that the correct name?
     

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    Last edited: Jan 16, 2010
  2. Bryant

    Bryant forgot more than learned

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    i think thats the flux capasitor. no really i have no idea what that is. the pic is a little fuzzy and maybe playing tricks on my eyes. it almost looks like a fuel sending unit that goes in the tank but its not right for that. more pics may help.
     
  3. scooper77515

    scooper77515 No current projects.

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    I agree with Bryant.

    Too fuzzy to tell if it is a flux capacitor or the reservoir for your headlight fluid.
     
  4. mike75mav

    mike75mav Member

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    OK I got a better picture. I had trouble with the camare.
     
  5. rthomas771

    rthomas771 Member

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    If it came off the valve cover bolt (above the fuel pump) then it is the spark delay valve. From the book: "The spark delay valve is a plastic, spring-loaded, color coded valve which is installed in the vacuum line to the distributor advance diaphragm on many 1972-77 models. Under heavy throttle application, the valve will close, blocking normal carburetor vacuum to the distributor. After the designated period of closed time, the valve opens, restoring the carburetor vacuum to the distributor."

    [​IMG]
     
  6. mike75mav

    mike75mav Member

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    That is the right part but, that is not the name of it. Not what the book says.
     
  7. rthomas771

    rthomas771 Member

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    What does you book say?

    [​IMG]
     
  8. darren

    darren Member

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    Looks like a vacuum solenoid. I would guess for distributor.
     
  9. mike75mav

    mike75mav Member

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    From what I could tell from the shop manuel that it is the solenoid value. That is in your drawing.
     
  10. dkstuck

    dkstuck Member

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    Isn`t that hooked into the speedometer cable?
     
  11. scooper77515

    scooper77515 No current projects.

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    Never seen or heard of anything like that...:hmmm:
     
  12. Thomas

    Thomas Member

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    Here is a pic of the one on my 250. At one time the wire was connected to a electric fuel pump and I always thought it looked funny that the hose loops back into itself. I still don't know what to do with it?
     

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    Last edited: Feb 3, 2010
  13. Rando76

    Rando76 Member

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    In the picture, it looks like there is only one vacuum hose on it. Didn't some '76-'77 cars have a vacuum controlled switch that illuminated the low fuel economy light? It was mounted somewhere on the valve cover too I think.
     

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