Originally Posted by Waltallshy
Where did you run the Manifold Purge Line? I assume you are running headers also. Thank you for the help. Please forgive my ignorance.
I only have the 258, no headers.
The manifold purge line from the 'modern' canister T's into the PCV line so they both go into the PCV fitting on the manifold at the base of the carb.
The purge 'signal' to turn on the canister comes from a 'ported' nipple (distributor advance is usually 'ported') and feeds through a CTO valve. The CTO valve only allows vacuum to flow when the engine is warmed up. If you don't have one, they are cheap and easy to put in.
The only other option is to vent the gas tank to the air. This really stinks, so bad it was getting in our hair and clothes.= when I tried to run mine open.
The stock gas cap will seal the tank and it will vacuum lock causing stalls, there is no vent back there, only a filler vent that is in use when filling the tank. Cap it and it is sealed.
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