vacum diagram? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hotrod70C10 · 01-01-2003, 03:09 PM

I am needing a vacum diagram for a four barrel quadrajet with electric choke. I'm also having trouble with the choke staying on at all times so the back two barrels aren't even opening. Anything will be a big help thanks

*Piston* · 01-01-2003, 03:21 PM

Hey Hotrod, what part of Moore do you live in? We used to live on NE 15th until 2 months before the big 'nado came to town!

There isnt really alot to the vacuum on these trucks, someone correct me if im wrong:
Brake booster
Vacuum advance
Canister purge/Vent
PCV

Where is the power coming from for your choke? Make sure its a constant 12v with key on. If power is always there, you could have a bad choke coil or its just adjusted way to tight.

Hotrod70C10 · 01-01-2003, 07:14 PM

I live off of southeast 12th street. My choke is powered off the stator. I unhooked the choke and put a load on the motor and the secondaries still won't open. I'm trying to get this all sorted out before i start putting together my new motor. The reason i was needing a diagram or is that I have a bunch of open vacum ports. Sorry if i'm not giving you anything to work with....
I have another question also. What did q-jet model #17057204 come off of originally?

01-01-2003, 03:09 PM	#1
Hotrod70C10 Low & Slow Join Date: Dec 2002 Location: Oklahoma Posts: 1,047	vacum diagram? I am needing a vacum diagram for a four barrel quadrajet with electric choke. I'm also having trouble with the choke staying on at all times so the back two barrels aren't even opening. Anything will be a big help thanks

01-01-2003, 03:21 PM	#2
Piston Account Suspended Join Date: Oct 2002 Location: Olathe, KS Posts: 2,301	Hey Hotrod, what part of Moore do you live in? We used to live on NE 15th until 2 months before the big 'nado came to town! There isnt really alot to the vacuum on these trucks, someone correct me if im wrong: Brake booster Vacuum advance Canister purge/Vent PCV Where is the power coming from for your choke? Make sure its a constant 12v with key on. If power is always there, you could have a bad choke coil or its just adjusted way to tight.

01-01-2003, 07:14 PM	#3
Hotrod70C10 Low & Slow Join Date: Dec 2002 Location: Oklahoma Posts: 1,047	I live off of southeast 12th street. My choke is powered off the stator. I unhooked the choke and put a load on the motor and the secondaries still won't open. I'm trying to get this all sorted out before i start putting together my new motor. The reason i was needing a diagram or is that I have a bunch of open vacum ports. Sorry if i'm not giving you anything to work with.... I have another question also. What did q-jet model #17057204 come off of originally?



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