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Old 02-24-2006, 08:31 AM
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Can anyone identify this 4" round ball cylinder

I have an 81 camaro, 350, stock HEI without vacume advance, all emissions are removed with the exception of the PCV. Question: I have a 4" round cylinder ball by the firewall on the passengers side and it has a vacume line running to it from the carb, but has the outlet plugged. Can anyone tell me what this is? And what it is used for? Right now the outlet is plugged...should it be?

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Old 02-24-2006, 09:27 AM
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It seemed like a good idea????

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Just a guess, Could it be for cruise control? I know some older cruise used a vaccum system.
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Old 02-24-2006, 09:48 AM
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vacuum reservoir....used so when you hit the skinny pedal, all the vac actuated doors, etc in the a/c system didn't all open/close, because of the sudden loss of a vacuum source.

which sucks
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