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  #16 (permalink)  
Old 08-13-2002, 08:20 AM
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Sounds liek it may be the vacuum diaphragm inside the canister on the side of your distributor. Then you blobk off the carb and vacuum canister it runs fine. When you plug it in it runs rough because the timing is being advanced. Are you using a ported or manifold vacuum port? Are you using a port close to the base of the carb or the top? You should be using one of the smaller ports on the bottom part of the carb or ported vacuum. If you are using the wrong vacuum port it will draw vacuum at any throttle position.

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  #17 (permalink)  
Old 08-13-2002, 11:38 PM
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i put a new vacume advance canister -diaphram on my distibutor im using manifold vacume there isnt any more port on my carb only that one it ran fine 2 weeks ago then just started doing this thats why im stumped
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