Electric Choke Q-Jet On 67-72?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Luis_gz06 · 02-20-2009, 11:55 PM

For the people that have stock electric choke Q-Jet carburetor's on your 67-72 trucks, how do you make it function? I have one installed on my 70, but dont know where to get the circuit to make it work. Anyone knows where to splice a wire or hook it from? Thanks!!

sbrad701 · 02-21-2009, 12:57 AM

You should be able to pull from any 12V source as long as it is only hot while ignition is on. If not a fused source I would add a fusible link. I believe Holley recommends 10A fuse so you should be fine with that on Rochester also. I would NOT connect it to the coil. That could possibly cause you problems. Hope this helps.

68C15 · 02-21-2009, 08:12 AM

I went to the fuse box.
tapping into the coil feed will cause driveability issues.

Sport/Truck · 02-21-2009, 10:17 AM

I think the M&H Harness I have taps power from the starter somewhere.
All I know it looks clean!
s/t

Longhorn Man · 02-21-2009, 05:15 PM

I don't see where there would be a wire on the starter for this... the starter has one wire that is hot all the time (bettery cable) one or two wires (depending on ignition system) that is hot when you are holding the key to start... that's it.
As indicated above, you need a key on source... ignition unfused is a perfect place. That would be a 10 amp fuse... not 10 volt.

Sport/Truck · 02-22-2009, 11:36 AM

Quote:

Originally Posted by Longhorn Man

I don't see where there would be a wire on the starter for this... the starter has one wire that is hot all the time (bettery cable) one or two wires (depending on ignition system) that is hot when you are holding the key to start... that's it.
As indicated above, you need a key on source... ignition unfused is a perfect place. That would be a 10 amp fuse... not 10 volt.

Then I must be wrong on this. I'll try and look to see where it's coming from.
s/t

sbrad701 · 02-23-2009, 07:52 PM

My appologies for the typo longhorn man. It is now corrected.

spinning wheels · 02-24-2009, 01:38 AM

Luis, I checked my wires on my truck. I installed an Edelbrock 1406 around 9 years ago, so my memory is rusty.

Seems the red, (hot wire), goes from the choke to the positive side on my ballast resister.
From there the hot wire, goes into the fuse block under the dash, to a 12 volt power source.

My truck originally had a divorced choke, so I didn't have a power source, when I installed the 1406.

Hope this info helps.

Blazer1970 · 02-24-2009, 07:00 AM

I used the switched hot wire that goes to the connector for the TCS relay. Most trucks have it hanging there unused anyway. Just crimp on a male spade connector and plug it in there.

02-20-2009, 11:55 PM	#1
Luis_gz06 Senior Member Join Date: Feb 2006 Location: Las Vegas Posts: 1,378	Electric Choke Q-Jet On 67-72?? For the people that have stock electric choke Q-Jet carburetor's on your 67-72 trucks, how do you make it function? I have one installed on my 70, but dont know where to get the circuit to make it work. Anyone knows where to splice a wire or hook it from? Thanks!! __________________ 1972 Chevrolet Blazer 4x4 (Almost done stay tuned) 1970 Chevrolet Pickup Longhorn CST/20 (SOLD)

02-21-2009, 12:57 AM	#2
sbrad701 Registered User Join Date: Mar 2005 Location: Graham, NC Posts: 23	Re: Electric Choke Q-Jet On 67-72?? You should be able to pull from any 12V source as long as it is only hot while ignition is on. If not a fused source I would add a fusible link. I believe Holley recommends 10A fuse so you should be fine with that on Rochester also. I would NOT connect it to the coil. That could possibly cause you problems. Hope this helps. __________________ If It'll roll I'll race it!!! Last edited by sbrad701; 02-22-2009 at 09:59 PM.

02-21-2009, 08:12 AM	#3
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: Electric Choke Q-Jet On 67-72?? I went to the fuse box. tapping into the coil feed will cause driveability issues.

02-21-2009, 10:17 AM	#4
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Electric Choke Q-Jet On 67-72?? I think the M&H Harness I have taps power from the starter somewhere. All I know it looks clean! s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

02-21-2009, 05:15 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Electric Choke Q-Jet On 67-72?? I don't see where there would be a wire on the starter for this... the starter has one wire that is hot all the time (bettery cable) one or two wires (depending on ignition system) that is hot when you are holding the key to start... that's it. As indicated above, you need a key on source... ignition unfused is a perfect place. That would be a 10 amp fuse... not 10 volt.

02-23-2009, 07:52 PM	#7
sbrad701 Registered User Join Date: Mar 2005 Location: Graham, NC Posts: 23	Re: Electric Choke Q-Jet On 67-72?? My appologies for the typo longhorn man. It is now corrected. __________________ If It'll roll I'll race it!!!

02-24-2009, 01:38 AM	#8
spinning wheels Registered User Join Date: Sep 2001 Location: Hacienda Heights, California USA Posts: 474	Re: Electric Choke Q-Jet On 67-72?? Luis, I checked my wires on my truck. I installed an Edelbrock 1406 around 9 years ago, so my memory is rusty. Seems the red, (hot wire), goes from the choke to the positive side on my ballast resister. From there the hot wire, goes into the fuse block under the dash, to a 12 volt power source. My truck originally had a divorced choke, so I didn't have a power source, when I installed the 1406. Hope this info helps. __________________ '72 GMC custom camper 350/350

02-24-2009, 07:00 AM	#9
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: Electric Choke Q-Jet On 67-72?? I used the switched hot wire that goes to the connector for the TCS relay. Most trucks have it hanging there unused anyway. Just crimp on a male spade connector and plug it in there. __________________ Tim



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