quadrajet springs needed
Thread Starter
Safety Car
Joined: Sep 2011
Posts: 4,115
Likes: 1,230
From: Madeira Beach, FL
2024 C8 of the Year Finalist - Unmodified
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2020 C3 of the Year Finalist - Unmodified
quadrajet springs needed
Happy Thanksgiving everyone.
I noticed my rebuilt quadrajet was missing two springs from the choke area. Any way, I went on line and checked the assorted quadrajet parts guys google returned as matches.
No one lists these springs and I'm going to need them.
It is a restamped 70's Quadrajet stamped to a rarer 68 BB carb #.
It runs nice except for the tough cold starts.
I could never figure out the choke.
It is still the divorced choke on the manifold.
I replaced the bi-metalic coil and still no good.
I followed Lars set up which works if you have all the parts
I noticed while looking at choke parts on line, I was missing a spring off the cam/fast idle lever.
Also there is a spring of similar size and function that sits on the unloader shaft and connects to the choke pull off lever.
I do not know the proper name of this 2nd spring.
I realize now why the choke butterfly never set on cold start.
Any one know where these can be found?
Used works too.
I did find the GM# on the cam lever spring. 7035772.
Thanks Again,
Marshal
I noticed my rebuilt quadrajet was missing two springs from the choke area. Any way, I went on line and checked the assorted quadrajet parts guys google returned as matches.
No one lists these springs and I'm going to need them.
It is a restamped 70's Quadrajet stamped to a rarer 68 BB carb #.
It runs nice except for the tough cold starts.
I could never figure out the choke.
It is still the divorced choke on the manifold.
I replaced the bi-metalic coil and still no good.
I followed Lars set up which works if you have all the parts
I noticed while looking at choke parts on line, I was missing a spring off the cam/fast idle lever.
Also there is a spring of similar size and function that sits on the unloader shaft and connects to the choke pull off lever.
I do not know the proper name of this 2nd spring.
I realize now why the choke butterfly never set on cold start.
Any one know where these can be found?
Used works too.
I did find the GM# on the cam lever spring. 7035772.
Thanks Again,
Marshal
Tech Contributor
Joined: Aug 1999
Posts: 14,377
Likes: 6,377
From: At my Bar drinking and wrenching in Lafayette Colorado
What's your carb number?
Also, is this just a re-stamped early '70s carb, or has the entire carb been "correctly" configured as a '68? The '68 float bowl is completely different from an early '70s carb, so stamping it won't "fix" the cosmetic configuration. Has all the choke linkage and all external parts been converted to the '68 style system..? Or is this carb still in its '70s configuration with a '68 carb number on it?
Lars
Also, is this just a re-stamped early '70s carb, or has the entire carb been "correctly" configured as a '68? The '68 float bowl is completely different from an early '70s carb, so stamping it won't "fix" the cosmetic configuration. Has all the choke linkage and all external parts been converted to the '68 style system..? Or is this carb still in its '70s configuration with a '68 carb number on it?
Lars
Last edited by lars; Nov 23, 2012 at 11:38 AM.
Thread Starter
Safety Car
Joined: Sep 2011
Posts: 4,115
Likes: 1,230
From: Madeira Beach, FL
2024 C8 of the Year Finalist - Unmodified
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2020 C3 of the Year Finalist - Unmodified
Lars,
Thanks for the response.
It is a 70's carb just stamped over as a 68(7028209 FG)
I think the internals are probably untouched still.
The choke linkage is a hodge podge of '71 replacement linkage
with a '68 style choke pull off. Hence it doesn't engage with the cam
lever.
I located the correct choke pull off based on looking at other
carbs w/ similar linkage and it looks to be a 1971 era.
The pics I have studied all show a fast idle cam lever wrapped w/ a spring.
Mine is not there
If you have one new or used I need it(please)
Thanks,
Marshal
Thanks for the response.
It is a 70's carb just stamped over as a 68(7028209 FG)
I think the internals are probably untouched still.
The choke linkage is a hodge podge of '71 replacement linkage
with a '68 style choke pull off. Hence it doesn't engage with the cam
lever.
I located the correct choke pull off based on looking at other
carbs w/ similar linkage and it looks to be a 1971 era.
The pics I have studied all show a fast idle cam lever wrapped w/ a spring.
Mine is not there
If you have one new or used I need it(please)
Thanks,
Marshal
Thread Starter
Safety Car
Joined: Sep 2011
Posts: 4,115
Likes: 1,230
From: Madeira Beach, FL
2024 C8 of the Year Finalist - Unmodified
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2020 C3 of the Year Finalist - Unmodified
That's the 1
You got any extras?
Marshal
You got any extras?
Marshal
Tech Contributor
Joined: Aug 1999
Posts: 14,377
Likes: 6,377
From: At my Bar drinking and wrenching in Lafayette Colorado
I can send you that spring, but it won't have any effect on the operation of your choke or on the solutions to the problems you have outlined in your original post - this spring does not pre-set the choke. The spring only provides a pre-load on the fast idle cam to prevent the fast idle cam from hanging up. That's not your problem, so you have other issues to identify and correct.
Lars
V8FastCars@msn.com
Lars
V8FastCars@msn.com
Thread Starter
Safety Car
Joined: Sep 2011
Posts: 4,115
Likes: 1,230
From: Madeira Beach, FL
2024 C8 of the Year Finalist - Unmodified
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2020 C3 of the Year Finalist - Unmodified
Lars,
I'd like to install the spring as it probably should be there.
It is the one in the pic in this post.
Can you let me know what I can do to purchase 1 please.
What I thought opened and closed the choke was the bi metalic coil so I replaced it.
I followed the set up procedure but it appears the coil doesn't have any effect on the choke .
The metal should expand upon heating correct?
It just sits full open.
It doesn't retract on cooling.
It does run nicely after initial warming.
I was hoping to get it 100%
Thanks,
Marshal
I'd like to install the spring as it probably should be there.
It is the one in the pic in this post.
Can you let me know what I can do to purchase 1 please.
What I thought opened and closed the choke was the bi metalic coil so I replaced it.
I followed the set up procedure but it appears the coil doesn't have any effect on the choke .
The metal should expand upon heating correct?
It just sits full open.
It doesn't retract on cooling.
It does run nicely after initial warming.
I was hoping to get it 100%
Thanks,
Marshal
Tech Contributor
Joined: Aug 1999
Posts: 14,377
Likes: 6,377
From: At my Bar drinking and wrenching in Lafayette Colorado
I'm waiting for you to e-mail me your address.
If your divorced choke coil is not reacting to heat changes, it's defective or installed wrong. When cold, the coil should pull the choke rod downwards, closing the choke. As it heats up, the coil should push the rod upwards, forcing the choke open. If the coil is installed backwards, it won't function correctly.
Lars
If your divorced choke coil is not reacting to heat changes, it's defective or installed wrong. When cold, the coil should pull the choke rod downwards, closing the choke. As it heats up, the coil should push the rod upwards, forcing the choke open. If the coil is installed backwards, it won't function correctly.
Lars
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Brett Foote
Racer
Joined: May 2005
Posts: 399
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From: Suffield CT
Marshal, Nice Car !
would love to see some pics of your Carb, to learn the differences of Qjets over the years.
As shown in pic in post 4 you can see the "saw teeth" on the cam to set the choke on cold start, what tooth did you set it to ?
Lar's post is dead on, as you turn the key on cold start you can watch the rod move and close the choke flap....does that even happen ?
Good Luck
-ALF out....
would love to see some pics of your Carb, to learn the differences of Qjets over the years.
As shown in pic in post 4 you can see the "saw teeth" on the cam to set the choke on cold start, what tooth did you set it to ?
Lar's post is dead on, as you turn the key on cold start you can watch the rod move and close the choke flap....does that even happen ?
Good Luck
-ALF out....
Tech Contributor
Joined: Aug 1999
Posts: 14,377
Likes: 6,377
From: At my Bar drinking and wrenching in Lafayette Colorado
Your spring is in the mail. I also e-mailed you the figures out of the Service Manual showing the position and action of the choke coil related to the manifold and actuation rod.
If you can't get it running right, send me the carb: Your carb sounds like a real cluster of parts, and it's probable that it has a bunch of odd problems related to mismatched parts and missing/altered components.
Lars
If you can't get it running right, send me the carb: Your carb sounds like a real cluster of parts, and it's probable that it has a bunch of odd problems related to mismatched parts and missing/altered components.
Lars
Thread Starter
Safety Car
Joined: Sep 2011
Posts: 4,115
Likes: 1,230
From: Madeira Beach, FL
2024 C8 of the Year Finalist - Unmodified
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2020 C3 of the Year Finalist - Unmodified
Lars,
Thank you very much!
If I'm still having trouble with it, I would love to have you do your magic on it.
Everyone who sent their carb to you on this forum has raved about how it performs.
I was thinking about having you go through it and make it "right"
over the winter so I can enjoy it this spring '13.
Thank you again.
Fazang: I need to learn how to take pics
My wife took away my pic taking privileges at family get togethers cause I usually crop off feet or tops of heads.
We have a digital camera downstairs with a dead battery now.
I never was much a camera guy but I guess I going to have to learn if I'm going to keep asking for help.
Marshal
Thank you very much!
If I'm still having trouble with it, I would love to have you do your magic on it.
Everyone who sent their carb to you on this forum has raved about how it performs.
I was thinking about having you go through it and make it "right"
over the winter so I can enjoy it this spring '13.
Thank you again.
Fazang: I need to learn how to take pics
My wife took away my pic taking privileges at family get togethers cause I usually crop off feet or tops of heads.
We have a digital camera downstairs with a dead battery now.
I never was much a camera guy but I guess I going to have to learn if I'm going to keep asking for help.
Marshal
Thread Starter
Safety Car
Joined: Sep 2011
Posts: 4,115
Likes: 1,230
From: Madeira Beach, FL
2024 C8 of the Year Finalist - Unmodified
2024 C2 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2020 C3 of the Year Finalist - Unmodified
Lars,
Thank you very much for the fast idle cam lever spring.
I think after enough studying the choke parts and correcting
the hodge podge of parts, I have finally got the choke to close properly under choke coil tension
I'm now playing with bending an 1/8 " dia. length of rod to get the choke rod right.
To be continued.......
Marshal
Thank you very much for the fast idle cam lever spring.
I think after enough studying the choke parts and correcting
the hodge podge of parts, I have finally got the choke to close properly under choke coil tension
I'm now playing with bending an 1/8 " dia. length of rod to get the choke rod right.
To be continued.......
Marshal
Last edited by marshal135; Dec 3, 2012 at 08:25 PM.