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Ray Balukas 08-03-2020 03:15 AM

Engine issue
 

I have an 8BA stock rebuilt { Walt Dupont} engine. It has run great, and still runs great except for 1 issue which just started. Taking off in 1st and 2nd gear , and winding her up, high revs the engine cuts out . If I dont wind it up it runs fine, no issues in 3rd gear. I have changed the points and condenser and timed it. Any help here would be great! Kind regards Ray

RobR'35 08-03-2020 04:37 AM

Re: Engine issue
 

Starving for fuel?

Ggmac 08-03-2020 06:11 AM

Re: Engine issue
 

Quote:

Originally Posted by Ray Balukas (Post 1916132)
I have an 8BA stock rebuilt { Walt Dupont} engine. It has run great, and still runs great except for 1 issue which just started. Taking off in 1st and 2nd gear , and winding her up, high revs the engine cuts out . If I dont wind it up it runs fine, no issues in 3rd gear. I have changed the points and condenser and timed it. Any help here would be great! Kind regards Ray

How high are you reving it ? Im leaning towards fuel starvation .
Stock fuel pump ? How old ? Tank and lines in good condition ?

G.M. 08-03-2020 08:40 AM

Re: Engine issue
 

Valves sticking a little. Needs a dose of
Marvel Mystery Oil. G.M.

Ray Balukas 08-03-2020 06:14 PM

Re: Engine issue
 

I have inspected the fuel line which looks fine, stock fuel pump 6 years old with about 4000 miles on it.The tank is clean. The 1 thing I noticed when under the hood revving the engine and letting off there is bubbles coming from the top of the pump into the glass bowl. not sure this is normal , as I said it runs great as long as I dont get into it and drive normal. I'll try the MMO also. Thanks for the info guys Ray

alanwoodieman 08-03-2020 06:34 PM

Re: Engine issue
 

air bubbles? change bowl gasket or rebuild pump/check valves, there is an air leak or the check valves are not working correctly. do a volume check

RobR'35 08-08-2020 02:03 AM

Re: Engine issue
 

Any results on this issue?

frnkeore 08-08-2020 03:18 AM

Re: Engine issue
 

Air leak in the flex line, going to the fuel pump.

nickthebandit 08-08-2020 05:06 AM

Re: Engine issue
 

Why do you mention a Walt DuPont engine ? Your problem doesn't appear to be because of Walt DuPont's work. You seem to have a fuel delivery problem.

cadillac512 08-08-2020 06:26 AM

Re: Engine issue
 

Quote:

Originally Posted by nickthebandit (Post 1917867)
Why do you mention a Walt DuPont engine ? Your problem doesn't appear to be because of Walt DuPont's work. You seem to have a fuel delivery problem.




Probably so we won't question the engine build since most of us know Walt's stuff is done correctly. That eliminates a lot of questions!


Terry

Pat/Ohio 08-08-2020 07:37 AM

Re: Engine issue
 

My 8BA was experiencing the same "cutting-out" at higher rpms and I replaced the vacuum advance canister. It ran great after that!

Pat

Ray Balukas 08-15-2020 06:10 AM

Re: Engine issue
 

I've been gone for a bit will get to looking at this soon. The reason I mentioned Walt was to state that it was a stock rebuild, and no other reason. Thanks Cadillac 512. Walt is the best


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