08-03-2020, 03:15 AM | #1 |
Senior Member
Join Date: Jul 2011
Location: Deerfield N.H.
Posts: 294
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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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08-03-2020, 04:37 AM | #2 |
Senior Member
Join Date: Dec 2014
Location: Upper Peninsula, Michigan
Posts: 604
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Re: Engine issue
Starving for fuel?
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08-03-2020, 06:11 AM | #3 | |
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Join Date: Jul 2016
Location: Lake worth Florida
Posts: 1,100
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Re: Engine issue
Quote:
Stock fuel pump ? How old ? Tank and lines in good condition ? |
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08-03-2020, 08:40 AM | #4 |
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Join Date: May 2010
Location: Florida and Penna.
Posts: 4,471
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Re: Engine issue
Valves sticking a little. Needs a dose of
Marvel Mystery Oil. G.M.
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08-03-2020, 06:14 PM | #5 |
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Join Date: Jul 2011
Location: Deerfield N.H.
Posts: 294
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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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08-03-2020, 06:34 PM | #6 |
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Location: upstate SC
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Re: Engine issue
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08-08-2020, 02:03 AM | #7 |
Senior Member
Join Date: Dec 2014
Location: Upper Peninsula, Michigan
Posts: 604
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Re: Engine issue
Any results on this issue?
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08-08-2020, 03:18 AM | #8 |
Senior Member
Join Date: Jul 2019
Location: Southern Oregon
Posts: 782
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Re: Engine issue
Air leak in the flex line, going to the fuel pump.
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08-08-2020, 05:06 AM | #9 |
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Join Date: May 2010
Location: Shippensburg, pa.
Posts: 416
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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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08-08-2020, 06:26 AM | #10 | |
Senior Member
Join Date: Apr 2019
Location: Kansas
Posts: 921
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Re: Engine issue
Quote:
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
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08-08-2020, 07:37 AM | #11 |
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Join Date: May 2010
Location: Wilmington, OH/Lakeland, FL
Posts: 952
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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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08-15-2020, 06:10 AM | #12 |
Senior Member
Join Date: Jul 2011
Location: Deerfield N.H.
Posts: 294
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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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