Thread: 292 Questions
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Old 07-04-2019, 02:26 PM   #107
straight6chevyguy
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Join Date: Dec 2018
Location: yamhill OR
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Re: 292 Questions

Quote:
Originally Posted by May70 View Post
I got the carb cleaner out and sprayed the carb. (see pic) does that hole above the distributor vac line suck fresh air or something? It seems odd its just open. When i spray carb cleaner at it or on the back near it the rpms drop 25 or 30....
Well you may have just found all or at least some of your problem!

That hole is DEFINITELY A VACUUM LEAK! (Unless someone can prove other wise)

I have two of this style monojet carbs and they both have two vacuum ports in the location in your picture.

I will run outside and snap a pic of the carb on my 65 for verification.
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1965 chevy c20 292 4speed http://67-72chevytrucks.com/vboard/s...d.php?t=777601
1976 chevy c10 250 4speed http://www.67-72chevytrucks.com/vboa...d.php?t=787037
1998 chevy c1500 4.3L 5speed (My current driver)
2002 Chevy s10 4.3L auto 4x4
1971 mercury monterey wagon 400 auto
To many projects!
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