The diaphragm in the pump is probably stretched or something. Deathanol did that to the original 1956 fuel pump in my Cadillac when it was mandated in metro Atlanta by the Feds. The pump would only put out half the required amount of fuel.

Ethanol proof rebuild on the pump did the trick.

ANyway, it doesn't matter why your pump is faulty, replace it with a rebuilt original. Send your original to Then & Now Automotive for a rebuild. Top notch work and reasonably priced.

Then and Now Automotive

447 Washington St
Weymouth, Ma 02188
Ph: 781.335.8860
Fax: 781.335.1925
https://www.thenandnowautomotive.com/auto-parts-store

Last edited by Gdads51; 02/18/2026 3:09 AM. Reason: update to new web address
1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)