Quadrajet Cold Start - Team Camaro Tech
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post #1 of 7 (permalink) Old Dec 31st, 12, 05:38 PM Thread Starter
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Mark
 
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Quadrajet Cold Start

Hey guys looking for some advice. I have a 69 Quadrajet with a divorced choke that is running like crap on cold starts. I will do my best to describe the problem. Upon cold starts the car starts and struggle to maintain 600 rpm. The high idle is set for 1200 rpms, when it is struggling the high idle cam is up, choke is closed with the proper 1/4" space being pulled from the choke pull off. also worth mentioning it is running rough as if it has a miss or is starving for fuel. If I keep the car running eventually the idle comes up to the 1200 rpms with no change in the choke or fast idle cam which all appear to be working properly.

Once the car warms up it runs fine and smooth.

Any thoughts or suggestions?

1969 Camaro SS
350/300 M20
12 Bolt 3:73 Posi
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post #2 of 7 (permalink) Old Dec 31st, 12, 08:42 PM
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Re: Quadrajet Cold Start

Next time of cold start, have assistant start engine and you open choke plate manually to see if it smooths out.
If so, then you may need to bend the choke pull-off rod to open plate, since it reads like choke pull-off is working.

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post #3 of 7 (permalink) Old Dec 31st, 12, 11:55 PM
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Re: Quadrajet Cold Start

May want to read this:
http://www.chevelles.com/techref/Adj...tic_Chokes.htm
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post #4 of 7 (permalink) Old Jan 1st, 13, 01:08 PM
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Nick
 
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Re: Quadrajet Cold Start

I think your carb drains off from the plugs shown in the pic and floods the cylinders' you can re seal them with JB weld or replace them.

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post #5 of 7 (permalink) Old Jan 4th, 13, 06:06 AM Thread Starter
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Mark
 
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Re: Quadrajet Cold Start

puff puff-Nice article, thanks. Thought I would update everyone on the issue I seem to have resolved. I put a rebuild kit in the carb. over the summer, car ran fine afterwards. In going over everything trying to find the problems I found the screws holding the carb together were loose, probably from the change in temp. tightened them up along with the carb to intake bolts and bam! Running fine on cold start up. I guess everything shrank when it got cold and loose screws/bolts led to leaks causing the problem.

1969 Camaro SS
350/300 M20
12 Bolt 3:73 Posi
Myfirst 69SS is offline  
post #6 of 7 (permalink) Old Jan 4th, 13, 06:14 AM
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Re: Quadrajet Cold Start

Cool! Maybe she just wanted to be touched...

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post #7 of 7 (permalink) Old Jan 4th, 13, 08:03 PM
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Re: Quadrajet Cold Start

Maybe


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