PCV set up on 1972
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Your setup is not correct. The PCV should be connected to the base of the carb as said above manifold vacuum and the vacuum tank should be connected also to manifold vacuum but in one of the manifold runners for a vacuum source. Whoever connected yours up just was looking for vacuum sources.
Thread Starter
Instructor
Joined: Mar 2019
Posts: 113
Likes: 25
Your setup is not correct. The PCV should be connected to the base of the carb as said above manifold vacuum and the vacuum tank should be connected also to manifold vacuum but in one of the manifold runners for a vacuum source. Whoever connected yours up just was looking for vacuum sources.
Thread Starter
Instructor
Joined: Mar 2019
Posts: 113
Likes: 25
I've had the car for 3 months and only noticed the fumes after getting it back from mechanic last week (fixing brakes). He did reconnect the vacuum to the carb at the same time which the previous owner had disconnected, ... thats got nothing to do with it eh? I've only just noticed the smoke now which I thought was strange.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Maybe ... for 3 months you've owned this C3 ... you had no thought / time to check for or notice a "smoke discharge" ... until ...
... until brought to your attention by your detail-oriented brake repairman ... next time, tip him.
... until brought to your attention by your detail-oriented brake repairman ... next time, tip him.
Thread Starter
Instructor
Joined: Mar 2019
Posts: 113
Likes: 25
Lol. No, total opposite. I'm very fussy with my car and just find it strange that its blowing smoke only now after coming back from mechanics shop. Mechanic said it would have been doing all the time and I've only just noticed. ..... mmmmmm, anyway it's doing it so I need to fix it. Just wondering how many years prior to me owning it has it been doing it.
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Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
PCV discharge line DOES go to the base of the carb, but not because it is 'manifold vacuum'. The line going to the PCV valve is from the fuel vapor canister. It only discharges when the engine is NOT at an idle condition. When it discharges, it combines with the PCV outlet gases and they are sent to the intake charge (air/fuel mixture) for burning during combustion. The stuff is sent there because the carb base is lower pressure than what is sent to it from the vapor canister and PCV valve. That fitting must be large enough to ingest that volume of gas, however. So sending it into another manifold vacuum fitting is not the right way to go. Determine the correct location on your carb base for the vapor canister exhaust and PCV valve exhaust and plumb it there.