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1940 Ford Pickup...Vapor Lock

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Old 11-05-2013, 12:05 PM
jarheadd87 jarheadd87 is offline
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1940 Ford Pickup...Vapor Lock

I was having issues with the truck running rough on hot days....it was suggested that it was vapor lock. On nice cool days it runs like a charm. Any remedies/suggestions to fix this problem? Wrapping the fuel lines really does not appeal to me.
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Old 11-05-2013, 01:14 PM
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Do you have a vented gas cap? I have read that that could help the problem.

Red
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Old 11-11-2013, 08:50 AM
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Quote:
Originally Posted by jarheadd87 View Post
I was having issues with the truck running rough on hot days....it was suggested that it was vapor lock. On nice cool days it runs like a charm. Any remedies/suggestions to fix this problem? Wrapping the fuel lines really does not appeal to me.
I've found that an instant cure for vapor lock is to place an inline gas filter just before the carburetor. The filter will cool the gas down and prevent vapor lock...plus, it looks a lot better than wrapping the fuel line...
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Old 11-11-2013, 08:57 AM
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I had the same problem this summer on hot (90+ F) days. I put on a new fuel pump, as the current one hadn't been rebuilt in three decades, and that solved my problem.
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Old 11-11-2013, 10:40 AM
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It could be the coil too. Running poorly or not at all when hot is the classic symptom of a bad coil.

For years I didn't dare shut my truck off when hot because it wouldn't start again. Then someone told me it was probably the coil and after replacing it all was good.
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