The Ford Barn

Bob Johnson · 09-01-2017, 09:02 PM

I drove my Model A about 65 miles today in temperatures over 100 degrees. Towards the end (last 5 miles) the car started to "buck" as if it was running low on fuel. I was able to get it to continue by opening up the GAV about one full turn. When I got home I opened up the hood to see what I could see. I have a short piece of clear plastic tubing as part of the fuel line. With the engine off I was surprised to see "vaporized fuel" bubbles passing through the fuel line from the carburetor towards the fuel tank. Obviously the fuel was being vaporized when it entered the fuel bowl in the carburetor. I tried to take a video of it but my smart phone would not take movies. It said it was too hot to take movies. It did let me take a couple of seconds of video before it shut down but you can not see much.

This is not traditional vapor lock. But I will call it vapor lock because there was vapor in the fuel line which was preventing normal fuel flow into the carburetor.

That is my story and I am sticking to it,

Bob

Tom Wesenberg · 09-01-2017, 10:24 PM

If it stalls in the heat, it's vapor lock. If it stumbles at red lights, it's vapor lock. If it boils over at 5 minute stops, it's vapor lock. This new gas sucks for cars with carburetors.

Y-Blockhead · 09-02-2017, 01:13 AM

Every opinion on vapor lock you ever wanted to read about... or not.

https://www.fordbarn.com/forum/showt...ght=vapor+lock

steve s · 09-02-2017, 11:10 AM

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(must not try to take just one punch at that tar baby... must not punch ... must not punch ...)

09-01-2017, 09:02 PM	#1
Bob Johnson Senior Member Join Date: May 2010 Location: California Posts: 977	Looks like vapor lock I drove my Model A about 65 miles today in temperatures over 100 degrees. Towards the end (last 5 miles) the car started to "buck" as if it was running low on fuel. I was able to get it to continue by opening up the GAV about one full turn. When I got home I opened up the hood to see what I could see. I have a short piece of clear plastic tubing as part of the fuel line. With the engine off I was surprised to see "vaporized fuel" bubbles passing through the fuel line from the carburetor towards the fuel tank. Obviously the fuel was being vaporized when it entered the fuel bowl in the carburetor. I tried to take a video of it but my smart phone would not take movies. It said it was too hot to take movies. It did let me take a couple of seconds of video before it shut down but you can not see much. This is not traditional vapor lock. But I will call it vapor lock because there was vapor in the fuel line which was preventing normal fuel flow into the carburetor. That is my story and I am sticking to it, Bob

09-01-2017, 10:24 PM	#2
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Looks like vapor lock If it stalls in the heat, it's vapor lock. If it stumbles at red lights, it's vapor lock. If it boils over at 5 minute stops, it's vapor lock. This new gas sucks for cars with carburetors.

09-02-2017, 01:13 AM	#3
Y-Blockhead Senior Member Join Date: Jul 2011 Location: Redondo Beach, CA Posts: 5,848	Re: Looks like vapor lock Every opinion on vapor lock you ever wanted to read about... or not. https://www.fordbarn.com/forum/showt...ght=vapor+lock

09-02-2017, 11:10 AM	#4
steve s Senior Member Join Date: May 2010 Location: Kalamazoo Posts: 1,656	Re: Looks like vapor lock Sponsored Links (Register now to hide all advertisements) (must not try to take just one punch at that tar baby... must not punch ... must not punch ...)