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.

 

Do you have a vented gas cap? I have read that that could help the problem.

Red

 

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...

 

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.

 

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.

 

 

I think the coil or possibly condenser could be the reason. On the 8ba in my '39 p/u I installed an electric fuel pump with a toggle switch under the dash in addition to the mechanical pump. I switch it on to prime the carb after the truck sits for a while. It also comes in handy on the occasional times I experience the beginnings of vapor lock.

 

Don't know how my post ended up in this thread - I have never even set foot in this particular forum...

 

Sorry for the necro-thread, the video was supposed to post to the "Vapor lock is jamaican me crazy" thread in the Dentside forum, but I guess the stupid scroll-down-to-related-threads 'feature' got me...