If you were in Houston you could borrow my back up 250. . Just tested my return system this weekend regulator backed all the way out -2.5psi. Free flow line into a 5/8" line in a gas can 1.5psi.
You know the Mallory 110 puts out normal carb pressure yet their identical EFI pump puts out 40psi. There must be an internal regulator spring that is maybe stuck or trash in it. They sell a new gasket kit for them I used to refreshen one, might call Mallory tech
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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