Q-Jet question with pic - Team Camaro Tech
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post #1 of 5 (permalink) Old Aug 15th, 08, 06:08 PM Thread Starter
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Patrick
 
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Location: Quitman Georgia
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Q-Jet question with pic

I don't think my back barrels are coming in. It drives great on the front, but when I mash it, it studders and won't hardly accelerate. Am I supposed to have something hooked up to the port on the side you see that is blocked off?

That screw that you see keeps the butterfly slightly open. I put it there because it starts better than if it was fully closed.

69RS/SS,383,10:1cr,4.10,60ft1.6sec,1/[email protected],1/[email protected],Vicjr,RPMheads,750dp, Proform main body, cam,246*-250*@.050,.510,522,1.6rr,700r4,3200stall
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post #2 of 5 (permalink) Old Aug 15th, 08, 06:30 PM
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Re: Q-Jet question with pic

The Q-Jet you have is known as divorced choke. there should be a coil mounted to your intake with a rod to activate the choke. unfortunately you have an intake for a hot air choke.

It starts easier with the screw in the side because your choke is not operating properly. also the secondaries will not open unless the choke is fully released so the choke mechanism may not be allowing this.

I can suggest several options.
1. Change to the proper intake and connect the proper choke coil and rod.
2. Change the carb a newer style Q-Jet with an electric choke. (my preferered option)
3. Tie the choke fully open and pulling the fast idle cam to fully released. also make sure the choke pull off vacuum actuator is operating properly.
you will not have a choke but you can pump the gas a few times if necessary to start.
TTFN
Mat

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post #3 of 5 (permalink) Old Aug 15th, 08, 07:24 PM
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Jim
 
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Re: Q-Jet question with pic

Here is mine on standard Intake, the hot air choke has worked very well for me, but either will do the job.


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post #4 of 5 (permalink) Old Aug 15th, 08, 07:45 PM
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Re: Q-Jet question with pic

What you see on the pass side of the secondaries is the "secondary lockout."

The metal thingy (arrow1) is only pulled back when the chock is fully open, and yours isn't (see Matt's post above)

Arrow 2 shows the secondary lockout plate engage in the pin in the secondary shaft, preventing the secondary throttle plate from opening, ever.

You need to fix that choke. Either convert it from divorced to hot ait, convert it to electric, or flat wire the sucker wide open (when it's open, arrow1 will drop down out of the way of that pin, and allow the secondaries to work.







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post #5 of 5 (permalink) Old Aug 15th, 08, 08:12 PM Thread Starter
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Patrick
 
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Re: Q-Jet question with pic

Thanks guys. I will tie wrap it open.

69RS/SS,383,10:1cr,4.10,60ft1.6sec,1/[email protected],1/[email protected],Vicjr,RPMheads,750dp, Proform main body, cam,246*-250*@.050,.510,522,1.6rr,700r4,3200stall
383 IS SOLD!
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