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allen.alvin Forum Newbie Posts 8 |
06-19-12 07:39 PM - Post#2239291
I have a Holley7456 on my 72 chevy pu w/350sb. On sharp acceleration we have a stumble but ease up to about 1,000 rpm's and then hit it and all is well. Any suggestion's. |
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JimKshortstep4x4 Chevytalk Moderator & "9th Year" Silver Supporting Member Posts 4169 
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06-20-12 04:41 PM - Post#2239583
Welcome to Chevy Talk from West Michigan! I would suggest that you first make sure the timing, vacuum advance, and mechanical advance is working as they should. I like 10-12 BTDC initial setting with 34-36 degrees total advance in by 2800 rpm. Also, hook the vacuum advance to the manifold vacuum side so that the vacuum is activated at idle speeds. On the carburetor make sure the accelerator pump linkage is adjusted and that the squirters produce a good spray with the engine turned off so that you can see what happens when the pedal is activated. Good luck! Jim PS: Pictures of your truck would be nice.
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allen.alvin Forum Newbie Posts 8 |
06-21-12 08:02 PM - Post#2239998
Thanks so very much for your input, I will follow up on these recomendation's and keep you informed on my progress. |
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allen.alvin Forum Newbie Posts 8 |
06-26-12 07:54 AM - Post#2241476
I checked out your suggestion's and found that the squirter's are not spraying as they should.Could this be linkage or dirty? I thought I had cleaned the carb thouroghly but must not have. Thanks,allen.alvin |
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JimKshortstep4x4 Chevytalk Moderator & "9th Year" Silver Supporting Member Posts 4169
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06-26-12 05:53 PM - Post#2241663
I would check the adjustment of the linkage first. Jim
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