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last question today, unstable idle

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Woodie

Woodie

Jedi Warrior
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I followed the su book, and hace the engine running nicely. Lots of pull, no hestitation. Problem is I need to keep the idle around 1200-1300, because evry little while the idle drops down to 600-700 or so, and stays there, I drive some and the idle comes back up. I set the idle at 1200-1300 so it would not stall out. Yesterday I had it idle at 1900-1800 so when it dropped it went to 1000-1100. I redid the carbs to make sure they were ok. ANy ideas?
 
Yep, see above. How are the shafts?
 
I dont know , How do you tell ??
 
A temporary fix. Go to ACE Hardware and get some "o" rings.
Put them on the shaft against the throttle body. This may help and will give you an indication if the shafts are leaking.
 
OK ok too fast... throttle shafts, thats the horizontal shaft that opens the butterflies ..right? How do you take them out to put o rongs on them. AND I just came back in, another issue maybe linked, the rear float bowl is not "tight" it can rotate about 20 degrees where it connects to the carb, I guess this should be tight, does the angle make much difference. It is full.
 
When you un-bolt the carbs (PIA) the carbs can be seperated. remove what ever clamps that are on the shafts, both sides, then slide the "O" rings against the carb. body. Then put it all back together. Before you do the above: You can test for leaks by starting engine and spraying carb. cleaner on the shafts where they go into the body. If engine falters, that is where the leak is. I am only writing this from memory and the memory is getting older.
 
Good advise all. Check the throtle rods with carb cleaner while eng is running.

After you disconnect carbs from each other you can wiggle the shafts. Not good.

I know of at least two places that will redo the shafts.

One is Joe Curto
22-09 126th Street
College Point NY 11356
he gets $95 for the job (2).

https://www.joecurto.com/index.php

The other is a member of this board, PeterC and I must let him speek for himself.

https://www.nosimport.com/?

However, in my mind that is a small price for two carbs. That and an overhaul kit is the same as new ones. Try $499 for a new set. These carbs are now over 40 years old, that's a lot of twisting on those shafts, they are all tired unless reworked I am sure. The joy is that they can be reworked and you have something when you are done.

Well there is a third but this guy is really expensive.

https://www.paltech1.com/

Seems to me that although all these guys are in business to make money they are also in love with old cars. Good folks to do business with, all of them as I hear.
 
Jack--who's doing your carbs? I'm looking at the need to get mine rebuilt.
 
I am doing my carbs. However PeterC is looking at the throtle rods. Carbs are not really dificult, it is just that new bushings and fiting the shafts is a bit beyond my simple capabilities here at home.
 
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