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Old 08-03-2020, 03:15 AM   #1
Ray Balukas
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Default 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
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Old 08-03-2020, 04:37 AM   #2
RobR'35
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Default Re: Engine issue

Starving for fuel?
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Old 08-03-2020, 06:11 AM   #3
Ggmac
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Default Re: Engine issue

Quote:
Originally Posted by Ray Balukas View Post
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 ?
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Old 08-03-2020, 08:40 AM   #4
G.M.
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Default Re: Engine issue

Valves sticking a little. Needs a dose of
Marvel Mystery Oil. G.M.
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Old 08-03-2020, 06:14 PM   #5
Ray Balukas
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Default 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
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Old 08-03-2020, 06:34 PM   #6
alanwoodieman
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Default 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
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Old 08-08-2020, 02:03 AM   #7
RobR'35
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Default Re: Engine issue

Any results on this issue?
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Old 08-08-2020, 03:18 AM   #8
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Default Re: Engine issue

Air leak in the flex line, going to the fuel pump.
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Old 08-08-2020, 05:06 AM   #9
nickthebandit
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Default 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.
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Old 08-08-2020, 06:26 AM   #10
cadillac512
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Default Re: Engine issue

Quote:
Originally Posted by nickthebandit View Post
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!


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Old 08-08-2020, 07:37 AM   #11
Pat/Ohio
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Default 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!

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Old 08-15-2020, 06:10 AM   #12
Ray Balukas
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Default 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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