She is sitting on my 250 IL. 2 barrel. The picture shows a port that while running and I put my finger over the opening I feel a patter, like a fast acting suction then pushing. It’s under the automatic choke. It has threads on it. Wondering what its function is?
Also behind it (it’s not clear in the picture) is a screw that looks like a mixture screw. I can’t tell it does anything while the motor is running. Anyone know what it is for?
Thanks.
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Last edited by Gdads51; 02/23/2024 2:18 PM. Reason: remove pic link from text to allow attachments to all display

1953 Chevy 153A 3/4-ton
Working on my project since 2015
Follow along in my DITY