Vapor lock on CA possible?

Sel Larsen · Jun 30, 2012

My '55 CA which is restored to original has started to act like it is not getting enough fuel. Carb was rebuilt by Sandy Lake and worked fine but now our summer temps are in the near 100's. The fuel line from tank is original copper?? metal. Could it be vapor locking and if so, how would you prevent it? Sometimes fuel will drip out of bottom drain in carb intake ventury but not all the time. Carb is Zenith.

old · Jun 30, 2012

If you remove the gas cap does it hurt or help??? Could well be a problem with the tank vent and building up pressure in the tank

chalmersbob(Pa) · Jul 1, 2012

The original gas line was steel.
I was told a copper line will cause vapor lock.
Bob

MT in Walford · Jul 15, 2012

If you made the mistake of putting ethenol in it, and it had not had ethenol before, the ethenol will loosen up a bunch of crud in the tank and may be plugging the fuel flow from the tank. Or some crud got into the carb bowl. Ck the fuel flow for about a minute, when the engine is cold, take the fuel line off at the carb and let it run into a coffee can for about a minute to see if you have good fuel flow. I had an old IH truck once that I made the mistake of putting ethenol in and it took quite a while and several clean out jobs as the ethenol cleaned out the system.

Vapor lock on CA possible?

Sel Larsen

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old

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chalmersbob(Pa)

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MT in Walford

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