Try a check valve in the line. Those older cars only have one line from the gas tank to the carb so there is no decision on which line to install it on. You could also add an electric fuel pump...turn on the pump, fill the line then start the car.
HOW TO PREVENT THE GAS FROM RUNNING BACK TO THE TANK DURING OVERNIGHT INCLINATED/SLOPED PARKING, ON BOTH MY CLASSICS BUICK REGAL 1979 301, CHEVROLET IMPALA 1979 350 CID
1979 Buick Regal 2-Door Coupe
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Maintenance & Repair
I have replaced the relay fuse under hood and the resister behind blower but not both at the same time.
2001 Buick Regal LS Sedan FWD
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Maintenance & Repair
also when I turn the key the security light flashes but only when I turn the key back.
1996 Buick Regal Custom Sedan FWD
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Maintenance & Repair
I left my windows open in my car today and it was raining hard when I got home I started the car and moved it under the car port , i went back out to leave a little while later and now it has no po...
1999 Buick Regal GS Sedan FWD
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Maintenance & Repair
My car cranks up but doesn't start n every time I hit the gas pedal to try to get it started, it leaks gas on that side. I can tell because the gas leaks onto the ground, just inside and in front of...
1997 Buick Regal LS Sedan FWD
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Maintenance & Repair
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