1965 Chevy Nova Vapor Lock

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.

Monday, March 9th, 2009 AT 5:22 PM

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Use fuel with lower volatility or you can try to shield the fuel pump and fuel line.

Was this

answer

helpful?

Yes

No

Monday, March 9th, 2009 AT 5:53 PM

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?

Was this

answer

helpful?

Yes

No

+1

Monday, March 9th, 2009 AT 5:56 PM

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.

Was this

answer

helpful?

Yes

No

Saturday, May 16th, 2009 AT 10:16 AM