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  #11  
Old 11-10-2014, 06:30 PM
Chandler63 Chandler63 is offline
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I am seriously hoping it's not a cam lobe. Checking lobe lift is a PIA. I think I will pull the lifters for 4&7 first, clean them and see if things improve. I'll post the results. Thank you all.
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  #12  
Old 11-13-2014, 12:32 PM
Chandler63 Chandler63 is offline
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So I cleaned the lifters for 4&7 and still no change. I am going over the fuel-spark-compression triangle and I think I need to focus on the carburetor like what was suggested before. I think I will try to find some new idle mixture screws since the ones on there currently may be worn. The other remote possibility is the intake manifold fuel passage which is common to 4&7. I will keep at it. I will probably start a new thread at some point when I get some new info. Cheers!
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  #13  
Old 11-13-2014, 12:57 PM
fcar fcar is offline
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Good luck!
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  #14  
Old 11-13-2014, 04:36 PM
Yadkin Yadkin is offline
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Mike's premium kit includes new idle mixture screws: http://www.carburetor-parts.com/Auto...it_p_2522.html
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  #15  
Old 11-13-2014, 10:31 PM
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I'm all about 'clean lifters', but how did you go about cleaning them?

The only way I know is to loosen the rocker shafts, pull the pushrods, pull the intake manifold off and start extracting lifters. Sometimes gunk at the bottoms will impede the check valves making them collapse and become noisy.

If that's what you did, it might have been a good opportunity to inspect the intake manifold and head ports, in case little squatters took up residency in the Manifold Motel. Just sayn'. - Dave
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  #16  
Old 11-18-2014, 11:39 AM
Chandler63 Chandler63 is offline
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Default 63 TB No Power on 4&7 Update

Power has been restored! The suggestion pointing me toward the carb, specifically the idle mixture screws was the ticket. It turns out that I had the wrong mixture screws installed. The new ones I purchased from Quadrajet Parts were about a 1/4 inch longer and made a huge difference. I am now running on all eight cylinders. Thanks again for all your help. Cheers!
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  #17  
Old 11-18-2014, 11:44 AM
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jopizz jopizz is offline
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Congrats. The simplest solutions are always the best.

John
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  #18  
Old 11-18-2014, 05:35 PM
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Ditto on your success!
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  #19  
Old 11-18-2014, 06:21 PM
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Here's the REAL winner; John you nailed it. (I knew you would.) Good show, ol' boy.
Quote:
Originally Posted by jopizz View Post
...The right side of the carburetor feeds cylinders 1,4,6,7. If the idle passage on the right side is partially blocked you will notice it more at low speed. One thing you can try is to remove the idle mixture screw on the right side and spray Gumout or any carburetor cleaner into the hole using the long plastic tip. I had constant problems with the idle passages on my Autolite 4100 carburetor getting clogged. After I changed to an Edelbrock carburetor the problem went away. I assume you adjusted the idle mixture screws on your rebuilt carb after you got it back.

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