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Re: Automatic Choke Problem
Posted by: Wagon Master ()
Date: June 13, 2017 08:57AM

[corvaircenter.com]

Look through this post. Should clear up all your questions.

'29 Ford Model A Tudor
'61 700 Lakewood 110 4 speed
'69 Monza Convert. 140 Auto.
'70 Dodge Challenger R/T 440 4 speed

Been aircooled since 1973
Northwest Ohio

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Re: Automatic Choke Problem
Posted by: MattNall ()
Date: June 13, 2017 10:32AM

I would suggest removing the good side and just matching the parts...

I always go with "What Works" !! and ask not why!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Automatic Choke Problem
Posted by: Migilla ()
Date: September 10, 2018 04:00PM

I’m having a similar issue with a ‘64 I just picked up. MIT hasn’t been drive. For 4 years but had been told it ran fine before so having the wrong arms in doesn’t seem feasible.
Should both butterflies be in the same positions? Ie, both open or both closed?
My left side stays closed, but the right won’t close when I manually try to shut it.
Won’t hold an idle and bogs horribly when I give it gas.

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Re: Automatic Choke Problem
Posted by: joelsplace ()
Date: September 11, 2018 02:07PM

The choke being open will only make it run poorly when cold. It should run fine once warmed up.

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Re: Automatic Choke Problem
Posted by: Migilla ()
Date: September 11, 2018 03:31PM

Did some cold/warm testing after liberal amounts of carb cleaner.
Both close when cold and she starts and runs smooth and idles fine.
Once warm, the right pops open but the left stays closed.
Then, when I give it gas it bogs and eventually dies.
Once warm and not running, if I toggle the right Butterfly it will just return to open. The left of I toggle it open, just closes again.
Would the issue be whatever that rod running down I tot he abyss is connected to?
Is there a way to see in there without dismantling the entire top of the engine?
I have photos and video but they’re too big to pst.
Thanks.

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Re: Automatic Choke Problem
Posted by: joelsplace ()
Date: September 11, 2018 07:28PM

They should both be wide open when the engine is warmed up. The left could be adjusted incorrectly or the thermostat is dead. I don't know if those fail open or closed.

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Re: Automatic Choke Problem
Posted by: MattNall ()
Date: September 11, 2018 08:15PM

Both close when cold and she starts and runs smooth and idles fine.
Once warm, the right pops open but the left stays closed.
Then, when I give it gas it bogs and eventually dies.
Once warm and not running, if I toggle the right Butterfly it will just return to open. The left of I toggle it open, just closes again.

===============================================================

Thanks for using SEARCH!! Now find the FAQ's gg
Top of the message list page...one of the STICKIES... Way more helpful! IMO

To stay on the CHOKLE problem

With engine OFF and cold..

rotate crossshaft to open throttles slightly

While holding open.... Push each choke arm DOWN and see if it springs back! If they do that Chokes are Fine. If not make sure the tube that the angle rod is screwed into isn't binding! BEND to fix!

THEN Start a new topic "New Member with '64 XXX with XXX engine needs help!"

You'll get more help!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo




Edited 1 time(s). Last edit at 09/12/2018 07:09AM by MattNall.

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Re: Automatic Choke Problem
Posted by: JimBrandberg ()
Date: September 12, 2018 04:53AM

I found some differences in the middle rod a few months ago. I brought one to a remote location and it was too short. Investigation showed that the bracket holding the coil was different too. The engine was a 66 110 and the rod/coil bracket was in a coffee can full of head parts from an unknown source.

So if the coils are all the same, there's 3 more parts that can differ, the bracket holding the coil that attaches to the head; the middle rod that goes up through the head and has one end bent to contact the coil and the other end with a female thread; the upper rod that screws into the middle rod and contacts the carburetor.

I was thinking the upper rods were all the same but I enjoy learning things here all the time. It's hard to tell when they're often bent in peculiar ways.

Jim Brandberg
Isanti, MN
CorvairRepair.com

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Re: Automatic Choke Problem
Posted by: Migilla ()
Date: September 12, 2018 07:33AM

Thank you and will keep the overall board comments in mind.

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Re: Automatic Choke Problem
Posted by: corventure Dave ()
Date: September 12, 2018 04:18PM

The vacuum choke brake diaphragm's should pull the chokes open about .190 when the engine starts. Then the bi-metal choke coil's will open them more as the engine warms up. Have had friends non-turbo Corvair's run horribly when cold just because one choke brake diaphragm was not working. That also created a vacuum leak.

If your bi-metal choke coils are indeed working, the rods from them to the carburetor's can be made-bent to fit. Sounds like yours are too long.


With a cold engine, adjust the rods out so they just slide into the hole in the choke tab, this with the chokes completly closed.

Corventure Dave

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