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12-10-2010, 09:57 PM
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#1 |
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Registered User
Join Date: Aug 2010
Location: Airdrie, AB
Posts: 40
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79 Carb question
He guys, I got a 79 GMC with the original quadrajet carb. When warmed up, I seem to have a bog or something when I take off. Seems to just be gutless. Once I get up to like 1,750 Rpms it seems to go away and run fine.
Just wondering if its that accelator pump? I have a quadrajet that I could rebuild, or and a edelbrock 600 that I could throw on. The only thing is its my daily driver and its -15 out. Just wondering what you guys suggest. Either throwing on that edelbrock, rebuild that quadrajet, or if something is just out of adjustment. Thanks for your time! |
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12-11-2010, 12:54 AM
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#2 |
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Gentleman Jim owner x2
 
Join Date: Oct 2010
Location: West Des Moines, IA
Posts: 464
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Re: 79 Carb question
Check the choke. It's probably not operating right. If it were the accelerator pump, it would do it every time you pushed on the gas; not just at low rpm's. Mine does the same thing though; the whole engine is totally gutless with my q-jet on it. But with my Edelbrock 650 it was perfectly fine. I think it's just the carb; I never have liked the q-jets, and mine is professionally rebuilt, too.
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1975 GMC Gentleman Jim #1 -357 / 700r4 1975 GMC Gentleman Jim #2 -350 / TH350 |
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12-11-2010, 10:14 AM
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#3 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,536
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Re: 79 Carb question
Your secondary air valve is set too loose. Causes a lean bog till you get up in rpm.
Here's a link for the best carb ever built. http://www.vetteprojects.com/kstyer/quadrajet.htm |
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