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Carburator Question

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Old Jul 12, 2007 | 11:31 AM
  #61  
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66GTKFB
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Default RE: Carburator Question

In your second picture, it appears that the secondary butterfly is partially open. At idle it should be closed. That may be a mechanical or vacuum problem.
Jim
Old Jul 12, 2007 | 11:36 AM
  #62  
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Default RE: Carburator Question

The secondary are those the round ones ? I Just removed the linkage completely and those round ones keep partialy open.
Old Jul 12, 2007 | 11:38 AM
  #63  
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Try adjusting the linkage near the firewall by making your rod longer. Also, it looks as if you are not hooked up to the very end of the rod at the carb. I know my Motorcraft hooks up differently, but you should still be working at the end of the rod.

[IMG]local://upfiles/10034/9D1568947846471C9490E32CD6925B1B.jpg[/IMG]

[IMG]local://upfiles/10034/49FEA6DA43D646539318A3F8B20C17B9.jpg[/IMG]
Old Jul 12, 2007 | 12:07 PM
  #64  
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Default RE: Carburator Question

Just made the rod a little longer and it looks like its better. She just ran a fast but steady idle this time and once she got hotter, the flie opened and the rpms got less. Turned her off and the flie stayed open, but thats normal i guess, it will close when the engine cools right.

Well lets hope that was the end of my carburator problem. Soaring & Jim, Thanks & i apologise if i ask a stupid question now and then. I am a computer expert but a beginner in car mechanics
Tommorow i'm getting mytires on my new rimms.I'll provide before and after pics
Old Jul 12, 2007 | 12:36 PM
  #65  
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And, 4 pages later, Michael gets his carburetor to purring. Now, when the engine cools down like say overnight, and you jump in to start it, pump the gas pedal to the floor twice. That will close the butterfly so that your choke will work, and you put a squirt of gas in the venturi so it will start faster.
Old Jul 12, 2007 | 02:15 PM
  #66  
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Default RE: Carburator Question

In that second picture, the choke is the lower one covering the main venturis. The venturis at the top of the picture are the secondary and they look partially open. Secondaries are either vacuum or mechanical actuated. There is probably an adjustment in any case. The bottom line is they should be closed - tight - until needed.
Jim
Old Jul 12, 2007 | 03:49 PM
  #67  
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Default RE: Carburator Question

ORIGINAL: 66GTKFB

In that second picture, the choke is the lower one covering the main venturis. The venturis at the top of the picture are the secondary and they look partially open. Secondaries are either vacuum or mechanical actuated. There is probably an adjustment in any case. The bottom line is they should be closed - tight - until needed.
Jim
Any idea where?
Old Jul 12, 2007 | 05:04 PM
  #68  
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I would think that there would be something attached to the shaft. Your three pictures don't show the right hand side clearly but I would look at the shaft and follow towhat ever actuates the butterflys.
Did you get an exploded view of the carb when you got it?
Jim
Old Jul 12, 2007 | 05:26 PM
  #69  
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those arent your secondaries open that is your secondary counter wieght that works off of momentum so that even if your secondaries are open they wont full blast down and bog the engine all af carbs have that counterweight unless its the new e-brock AVS then it has been replaced with a tunable screw vs drilling that weight
Old Jul 12, 2007 | 06:10 PM
  #70  
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Brandontyler65,
I think I know what you tried to convey, but your written language needs help.
Now, for information to all, what causes the secondarys to open on this carb? I can't think of any four barrel carburetor that has its secondary butterflys 'partially' open during idle or normal operation. Somewhere, way back when, I remember a scenerio where a carburetor's vacuum actuated secondarys opened up due to the main butterflys being opened too much, as in too much idle adjustment or a bent rod to the vacuum diaphram.
Jim
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