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65panhed · 01-04-2023, 02:41 PM

1st Check your pump squirter size and the pump cam. Then check the spring in the secondary vacuum can.
go up from say a 25 to 28 or 31.
2nd check ur pump cam color & position.

01-04-2023, 02:41 PM	#7
65panhed Registered User Join Date: Jan 2018 Location: Oklahoma City Oklahoma Posts: 13	Re: 600 holley stumble 1st Check your pump squirter size and the pump cam. Then check the spring in the secondary vacuum can. go up from say a 25 to 28 or 31. 2nd check ur pump cam color & position.