Divorced choke problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 02-03-2005, 01:43 AM

I got a qjet on my 68 1/2 ton. Divorced choke is not pulling the choke level down to engage the choke. I have made the rod longer and still no go. One thing I did notice is that the metal spiral ( i cant think of the name of it) is being pulled up. What am I doing wrong here?

Thanks

powell72 · 02-03-2005, 02:17 AM

Is it the factory intake?

skokie · 02-03-2005, 02:27 AM

Nope its a edelbrock performer 2101.

Brewster · 02-03-2005, 05:17 AM

You can get a choke thermastat, or coil, that pulls the other way.
I sold many back when they all had points and condenser. Go to a parts store that has old guys working there and they will know what you need. Type of intake will not matter, you have the right idea, making the rod yourself to fit. It will work fine after you get the proper choke coil.

6869704X4 · 02-03-2005, 10:25 AM

You do know that you have the open the throttle a bit to set the choke? By making the rod longer it wouldnt pull down as far.

Brewster · 02-03-2005, 05:12 PM

That is true but you want to check the choke coil operation by warming it with a lighter. When fully warm it will hold the choke flap fully open. Later types have vacuum pull offs to help pull the choke flap open, you may have that kind. If so check the pull off operation with a vacuum pump. The vacuum pull off will work with the engine running and has no effect when the engine isnt running. I use coat hanger wire to make a linkage to the proper length, some times I make a few before I have the right one.
Also the choke linkage will push the choke flap closed when you push the throttle all the way open, WHEN COLD. For proper performance the choke flap must open all the way when at operating temp., if it stays partly closed the engine will run poorly and get bad gas mileage. Let me know if you have any problems, I may have missed something.

skokie · 02-03-2005, 08:54 PM

Thanks guys. I am going to get a pic posted tonight when I get home. After reading this I think I may have missed something.

Thanks

jostrans68 · 02-03-2005, 10:29 PM

you need to get the kit from edelbrock it is the rod and the heat coil and cover I have this setup in my 68

skokie · 02-03-2005, 11:05 PM

I have the kit from edelbrock. Pn# 1931. Can you post a pic of your setup?

skokie · 02-04-2005, 01:02 AM

here are the pics. I took off the dog house.

86SILVERADO · 02-04-2005, 10:29 AM

Skokie. I think your problem is that the rod that goes down through the airhorn (the one I circled in pink) is not attached to the lever inside the carb. It looks off in the pic from where it should be. It is not easy to get this thing hooked up. get a flashlight and try to look down into the carb body and see if that thing is hooked up. it might move a little bit when you move the lower linkage (in green) even if it is not hooked into the tang inside there but from here it looks like it is not hooked in and is maybe just riding ontop of the tang. If the tang on the choke butterfly shaft has a screw in it then you are in luck because you can take it off and just fish the rod around in there and try to get it through the hole in the tang down inside the carb body. If it cannot be unscrewed then you are in for a little fun. You actually have to remove the airhorn and get it hooked in with the choke rod attached to the airhorn. I hope I am wrong because this is kind of a pain to get right if you have never done it before and somewhat hard to describe as well, but I think there is a good chance that that is what is going on here.

skokie · 02-04-2005, 12:46 PM

86silverado
I checked that lever and it is connected to the choke lever. Also for the heck of it I made my rod longer and low and behold it worked. Choke plate is about 2/3rds closed. Im not sure if its supposed to be 100% closed but hey its a start. I can make it a little longer and go from there.
Thanks for the help.

Brewster · 02-04-2005, 05:35 PM

Skokie, your engine is very clean and nice looking for a driver, you must be good at keeping up with all the little needs of the SBC. I am sure you will sort of these carb issues.
86 Silverado you are very knowledgeable about Qjets, are you an old school gear head? Carb operation is a lost art to some nowdays. Thanks all, Brewster

*rage'nrat638* · 02-04-2005, 09:11 PM

the problem is you have a rod thats to long ...going from the choke coil on the intake going to the carb....

your choke plate is open.......and the coil can't retract any more

*rage'nrat638* · 02-04-2005, 09:16 PM

this what it should look like cold

86SILVERADO · 02-04-2005, 09:20 PM

Glad you got it figured out. Just run it and see how it idles. In your neck of the woods you should be fine with it a little to the lean side of things and the choke will open faster that way anyway which will save you fuel. With that setup normally it is fully closed and as soon as it fires the choke pulloff opens it up about 1/8 of an inch or so but the feds in cali will probably love you if it is a little to the lean side anyway.

86SILVERADO · 02-04-2005, 09:31 PM

Quote:

Originally Posted by Brewster

Skokie, your engine is very clean and nice looking for a driver, you must be good at keeping up with all the little needs of the SBC. I am sure you will sort of these carb issues.
86 Silverado you are very knowledgeable about Qjets, are you an old school gear head? Carb operation is a lost art to some nowdays. Thanks all, Brewster

Knowledgeable enough to have scrapped the auto choke and replaced it with a manual.

I never liked any of the versions of the auto chokes and have always felt that they are a tradeoff of wasted fuel and excess engine wear for the sake of convienience. So I guess you could say that I am old school but I do have an HEI in the 67 so I am not that bad.

skahide · 02-12-2005, 01:07 AM

ttt

6869704X4 · 02-12-2005, 11:48 AM

If I remember right with the choke(fast idle) set and engine warmed up it should idle at about 1100-1200 rpm. Anybody else?
Im also manual choke.

02-03-2005, 01:43 AM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	Divorced choke problems I got a qjet on my 68 1/2 ton. Divorced choke is not pulling the choke level down to engage the choke. I have made the rod longer and still no go. One thing I did notice is that the metal spiral ( i cant think of the name of it) is being pulled up. What am I doing wrong here? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

02-03-2005, 02:17 AM	#2
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Is it the factory intake? __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

02-03-2005, 02:27 AM	#3
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	Nope its a edelbrock performer 2101. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

02-03-2005, 10:25 AM	#5
6869704X4 Registered User Join Date: Jul 2002 Location: SE NM Posts: 769	You do know that you have the open the throttle a bit to set the choke? By making the rod longer it wouldnt pull down as far. __________________ The more I learn about women, the more I love my truck.

02-03-2005, 08:54 PM	#7
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	Thanks guys. I am going to get a pic posted tonight when I get home. After reading this I think I may have missed something. Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

02-03-2005, 05:17 AM	#4
Brewster New Member Join Date: Jun 2002 Location: Lyons Michigan Posts: 10	You can get a choke thermastat, or coil, that pulls the other way. I sold many back when they all had points and condenser. Go to a parts store that has old guys working there and they will know what you need. Type of intake will not matter, you have the right idea, making the rod yourself to fit. It will work fine after you get the proper choke coil.

02-03-2005, 05:12 PM	#6
Brewster New Member Join Date: Jun 2002 Location: Lyons Michigan Posts: 10	That is true but you want to check the choke coil operation by warming it with a lighter. When fully warm it will hold the choke flap fully open. Later types have vacuum pull offs to help pull the choke flap open, you may have that kind. If so check the pull off operation with a vacuum pump. The vacuum pull off will work with the engine running and has no effect when the engine isnt running. I use coat hanger wire to make a linkage to the proper length, some times I make a few before I have the right one. Also the choke linkage will push the choke flap closed when you push the throttle all the way open, WHEN COLD. For proper performance the choke flap must open all the way when at operating temp., if it stays partly closed the engine will run poorly and get bad gas mileage. Let me know if you have any problems, I may have missed something.

02-03-2005, 10:29 PM	#8
jostrans68 Jostrans68 Join Date: Mar 2001 Location: Bloomington indiana Posts: 1,182	you need to get the kit from edelbrock it is the rod and the heat coil and cover I have this setup in my 68 __________________ [CGTW Member former 67-72 now with a 96 silverado

02-03-2005, 11:05 PM	#9
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	I have the kit from edelbrock. Pn# 1931. Can you post a pic of your setup? __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

02-04-2005, 01:02 AM	#10
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	here are the pics. I took off the dog house. Attached Images __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

02-04-2005, 10:29 AM	#11
86SILVERADO Registered User Join Date: Dec 2002 Location: Hills of Western Mass Posts: 626	Skokie. I think your problem is that the rod that goes down through the airhorn (the one I circled in pink) is not attached to the lever inside the carb. It looks off in the pic from where it should be. It is not easy to get this thing hooked up. get a flashlight and try to look down into the carb body and see if that thing is hooked up. it might move a little bit when you move the lower linkage (in green) even if it is not hooked into the tang inside there but from here it looks like it is not hooked in and is maybe just riding ontop of the tang. If the tang on the choke butterfly shaft has a screw in it then you are in luck because you can take it off and just fish the rod around in there and try to get it through the hole in the tang down inside the carb body. If it cannot be unscrewed then you are in for a little fun. You actually have to remove the airhorn and get it hooked in with the choke rod attached to the airhorn. I hope I am wrong because this is kind of a pain to get right if you have never done it before and somewhat hard to describe as well, but I think there is a good chance that that is what is going on here. Attached Images __________________ 86 Silverado C10 back to 305 power! 67 C30 Dually Dump, with 350 transplant, Rockhauler 05 Duramax 3500 "If at first you don't succeed, try a bigger hammer" Member of the 1-Ton club!

02-04-2005, 12:46 PM	#12
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,339	86silverado I checked that lever and it is connected to the choke lever. Also for the heck of it I made my rod longer and low and behold it worked. Choke plate is about 2/3rds closed. Im not sure if its supposed to be 100% closed but hey its a start. I can make it a little longer and go from there. Thanks for the help. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

02-04-2005, 05:35 PM	#13
Brewster New Member Join Date: Jun 2002 Location: Lyons Michigan Posts: 10	Skokie, your engine is very clean and nice looking for a driver, you must be good at keeping up with all the little needs of the SBC. I am sure you will sort of these carb issues. 86 Silverado you are very knowledgeable about Qjets, are you an old school gear head? Carb operation is a lost art to some nowdays. Thanks all, Brewster

02-04-2005, 09:11 PM	#14
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	the problem is you have a rod thats to long ...going from the choke coil on the intake going to the carb.... your choke plate is open.......and the coil can't retract any more

02-04-2005, 09:16 PM	#15
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	this what it should look like cold Last edited by rage'nrat638; 07-12-2007 at 07:05 AM.



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02-04-2005, 09:20 PM	#16
86SILVERADO Registered User Join Date: Dec 2002 Location: Hills of Western Mass Posts: 626	Glad you got it figured out. Just run it and see how it idles. In your neck of the woods you should be fine with it a little to the lean side of things and the choke will open faster that way anyway which will save you fuel. With that setup normally it is fully closed and as soon as it fires the choke pulloff opens it up about 1/8 of an inch or so but the feds in cali will probably love you if it is a little to the lean side anyway. __________________ 86 Silverado C10 back to 305 power! 67 C30 Dually Dump, with 350 transplant, Rockhauler 05 Duramax 3500 "If at first you don't succeed, try a bigger hammer" Member of the 1-Ton club!

02-12-2005, 01:07 AM	#18
skahide Looking @ 67 Chevy Short Step Join Date: Jul 2004 Location: Near Tyler, Texas Posts: 136	ttt

02-12-2005, 11:48 AM	#19
6869704X4 Registered User Join Date: Jul 2002 Location: SE NM Posts: 769	If I remember right with the choke(fast idle) set and engine warmed up it should idle at about 1100-1200 rpm. Anybody else? Im also manual choke. __________________ The more I learn about women, the more I love my truck.

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