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1965 Chevy Nova Vapor Lock

Tiny
N2TONY20
  • MEMBER
  • 1965 CHEVROLET NOVA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 67,000 MILES
I have a 65 chevy II nova. When the engine gets to temp it will run very rich and stall out. It will not start on its own, after that. If I pour gas into the carb it will start long enough to burn off the gas I poured into the carb, and then dies. After a few times it will usually stay running long enough to get me home. When I pour the gas into the carb the gas actually boils in the carb. I dont believe the carb should be that hot and I think the reason it works after a bit is the gas cools the carb enough to run. What would cause the carb to get that hot and how can I fix it. Any other ideas would be appreciated. The entire fuel system is new or rebuilt from the gas tank all the way to the carb.
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Monday, March 9th, 2009 AT 5:22 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Use fuel with lower volatility or you can try to shield the fuel pump and fuel line.
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Monday, March 9th, 2009 AT 5:53 PM
Tiny
N2TONY20
  • MEMBER
  • 2 POSTS
I am using 87 octain from the reg pumps should I be using something else. I have tried the 91 but doesnt make a difference.

How do I shield the pump?
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Monday, March 9th, 2009 AT 5:56 PM
Tiny
MGIBB101
  • MEMBER
  • 3 POSTS
I was having a similar issue with my 66 Nova after I did a motor swap. I solved my problem by relocating my fuel line to the pump, onto the outside of the frame rail. My headers were causing a vapor lock in the line.
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Saturday, May 16th, 2009 AT 10:16 AM

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