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Old 09-11-2015, 01:20 PM   #1
C21EddieV
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Vapor Lock

I have a 69 Chevy C10. I live in So.Cal and it's been hot & humid! Twice this week I've had a vapor lock! Once in the fast lane on the fwy! What's the best way to correct this issue? I'd appreciate any advice.
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Old 09-11-2015, 03:43 PM   #2
cdowns
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Re: Vapor Lock

vapor lock is mostly an old wives myth it doesn't really exist// check your fuel system start at the gas cap and slowly work your way methodically to the carb
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Old 09-11-2015, 04:07 PM   #3
Orence1
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Re: Vapor Lock

Take a look at the location of your fuel filter/fuel line. I had a similar issue in that mine would start fine when cold but when hot it was hard starting during summer heat. No issues in cooler spring or fall. Fuel filter was down about mid block and was picking up a lot of heat. Moved it up the line to the top of the engine and near the carburetor. End of problem.
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Old 09-11-2015, 04:09 PM   #4
Mmorgan32
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Re: Vapor Lock

Same thing happened to me when I moved to Fresno. I put on an edelbroke 1/2 in thick heat riser. I just ordered it from summit and I shortened my fuel hose going to my carb cause it was touching my valve cover. Never happened again.
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Old 09-11-2015, 08:21 PM   #5
C21EddieV
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Re: Vapor Lock

Thank you all! Much appreciated!
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Old 09-11-2015, 08:25 PM   #6
Tillik
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Re: Vapor Lock

I bent a new Fuel line from my mech pump. Wrapped it in Heat Tape. That helped a ton but the Phenolic? Spacer pretty much eliminated my issues with that. Good Luck
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Old 09-17-2015, 02:11 PM   #7
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Re: Vapor Lock

I had that reoccurring issue. It progressively got worse until the truck refused to start, and had to be towed home.

From there I diagnosed the problem to a failed fuel pump. Once I replaced it, I've never had vapor lock symptoms again. And I live in the Arizona desert, and that was probably 4 - 5 years ago!

Apparently, a pump can show these symptoms as a precursor to complete failure. I don't know if I'd performed a pressure test if I would've seen any problems.

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Mike
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