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Old 06-09-2015, 06:18 PM   #1
kool1972
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Carb problems

I have a 1972 C20 402 big block. I installed a rebuild carb of the same type. Quadrajet. Now my issue is that I can not get the truck off the line. When I try to give it throttle from a stop it hesitates and pops through the carb. Once the truck is rolling at approximate 10 MPH it seems to drive fine. Then it starts over when I have to stop at a light. The timing is at 8 degrees. new HEI dizzy.

Ideas?
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Old 06-09-2015, 06:22 PM   #2
WarMonger
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Re: Carb problems

All the lines hooked up? Vacuum?
__________________
..................... ____
.........________//__{\_____
,,,,,,,/__(O)___//___/__(O)_/
1970 C20
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-_--_-_ |_(0)|__|_(0)]
1972 K5
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Old 06-09-2015, 06:29 PM   #3
geezer#99
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Re: Carb problems

Bump your timing up to 14 initial. Plug the vac line to the dizzy vac pot when you set it.
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Old 06-09-2015, 07:06 PM   #4
kool1972
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Re: Carb problems

Quote:
Originally Posted by WarMonger View Post
All the lines hooked up? Vacuum?
Yes, all the lines are hooked up. I have vacuum at the port. Last time I checked it was 10 inches at idle.
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Old 06-09-2015, 07:06 PM   #5
kool1972
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Re: Carb problems

Quote:
Originally Posted by geezer#99 View Post
Bump your timing up to 14 initial. Plug the vac line to the dizzy vac pot when you set it.
Thank you. I will give this a shot tonight.
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Old 06-10-2015, 11:07 AM   #6
kool1972
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Re: Carb problems

Thank you geezer#99, that did the trick. the truck is running great now.
Thank you again.
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