carb pulls no vacuum when accelerating

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Joined
May 19, 2013
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1
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8
Hi, I got CARB rebuild after it is not working correctly no vacuum at part throttle full throttle
Vacuum advance port on carb.?


At first it was working taking hoses off plugging adjusting timing
No truck shuts down if you touch main vacuum advance hoses closes too distributed
Any ideas greatly appreciated
!?
?
 
Zero vacuum under load is NORMAL.
 
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