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Topic: 74 CorvetteVapor Canister

in Forum: C3 Fuel, Emission Control, and Exhaust Systems

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74 CorvetteVapor Canister

Posted: 7/29/08 3:57am Message 1 of 5
sbono
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Joined: 7/29/2008
Posts: 6
Does the purge hose from the canister connect to ported or manifold vacuum on the carburetor? It is currently teed into the PCV Hose


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74 CorvetteVapor Canister

Posted: 7/29/08 5:07am Message 2 of 5
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Small block or big block?
Small blocks run to full(manifold) vacuum at the carb base.
Big blocks tee off of the PCV hose, which is still manifold vac. Adams' Apple2008-07-29 05:08:06


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74 CorvetteVapor Canister

Posted: 7/29/08 12:59pm Message 3 of 5
sbono
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Joined: 7/29/2008
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This is a small block but appears to be plumbed like a big block


74 CorvetteVapor Canister

Posted: 7/29/08 1:03pm Message 4 of 5
sbono
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Joined: 7/29/2008
Posts: 6
Does it make a differance plumbed at Carb or PCV Valve?


74 CorvetteVapor Canister

Posted: 7/29/08 1:33pm Message 5 of 5
sbono
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Joined: 7/29/2008
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Little more info on this item. This car had every incorrect part in the feul system. I installed correct fuel pump with vapor return line, new canister. I also installedd a Pertronix electronic ignition, Edelbrock carb/manifold. The car ran fine to a local car cruise. After about 3 hours of sitting, fired it up to go home. Also filled up with gas on the way. Out of the blue when coming to idle the engine just stalled, restarted but would not idle. This is a 4speed car. Got curious about vap system plumbing. Disconnect PCV and plugged and it would idle somewhat. I thinking the problem is the purging of the canister with manifold vacuum. Any suggection are welcomed. 


in Forum: C3 Fuel, Emission Control, and Exhaust Systems


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