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#1 |
Senior Member
![]() Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,303
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600 holley stumble
I have a holley 600 on my 327 engine. I rebuilt the carb and it runs fine except when I give it gas quick it stumbles real bad. I adjusted the floats and the idle screws. The accelerator pump moves as soon as I move the throttle.
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#2 |
Senior Member
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Location: TN.
Posts: 7,896
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Re: 600 holley stumble
Did you use an adjustable power valve?
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#3 |
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Re: 600 holley stumble
I just used the one that came in the kit.
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#4 |
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Location: TN.
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Re: 600 holley stumble
I searched and I cannot find an Adjustable one.
Maybe they discontinued them. I drove to Quick Fuel in Bowling Green, KY years ago. They help me fix my Carb. They do not have good reveiws now ![]() The power valve and jets were my biggest issue. Do you have a vaccum secondary? They still make those . I used one of those also. Link: https://www.holley.com/products/fuel...parts/63-12QFT It took some time to tune these in right.
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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#5 |
Senior Member
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Location: mountain view arkansas
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Re: 600 holley stumble
Yes vacuum secondarys
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#6 |
Senior Member
![]() Join Date: Oct 2012
Location: mountain view arkansas
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Re: 600 holley stumble
Ok so I dumbed up and had the spring below the diafriam instead of above it
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#7 |
Registered User
Join Date: Jan 2018
Location: Oklahoma City Oklahoma
Posts: 13
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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. |
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