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Old 08-23-2022, 07:43 AM   #2
CC69Rat
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Join Date: Jan 2011
Location: Chattanooga TN
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Re: 305 surging at Highway speed only

My thoughts would be:

Vacuum leak
Vacuum advance
Fuel pump

Do you hear any hissing sounds that sound like they aren't normal? When it surges, does it crack, pop and backfire any at all?
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