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01-03-2023, 07:37 PM
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#1 |
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Registered User
Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,300
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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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01-03-2023, 08:07 PM
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#2 |
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Senior Member
 
Join Date: Dec 2009
Location: TN.
Posts: 7,761
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Re: 600 holley stumble
Did you use an adjustable power valve?
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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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01-03-2023, 08:32 PM
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#3 |
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Registered User
Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,300
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Re: 600 holley stumble
I just used the one that came in the kit.
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01-03-2023, 09:13 PM
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#4 |
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Senior Member
Join Date: Dec 2009
Location: TN.
Posts: 7,761
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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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01-04-2023, 07:54 AM
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#5 |
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Registered User
Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,300
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Re: 600 holley stumble
Yes vacuum secondarys
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01-04-2023, 11:41 AM
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#6 |
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Registered User
Join Date: Oct 2012
Location: mountain view arkansas
Posts: 1,300
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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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01-04-2023, 02:41 PM
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#7 |
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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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