Question about 1991 Buick Roadmaster

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Fuel pump problem

50 buick fuel pump has been replaced but wont pump gas as if its blocked so the engine will turn over but wont start because its not getting any gas

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  • trentcmarsh May 29, 2009

    clean lines and the gas tank but it still seems that the pump is not getting any suction when the engine is cranking?


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The vehicle is a 1950? If so it will have a strainer in the tank. You can remove the gas cap, the supply line to the pump and blow compressed air back to the tank. It will blow this strainer off. If you do this then you will need to install an in line filter to catch any trash before the carb. Also sometimes it is hard to get a mechanical pump to pick up fuel after replacement, so it may be necessary to pour a small amount of gas in the carb. Good Luck.

Posted on May 29, 2009

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How do you start a engine of a 97 Buick Century Limited after its been flooded?

Your car has an electric fuel pump installed the gas tank. Pressing the gas pedal does not bring gas into the engine like the cars fitting with mechanical pumps connected to the engine.

To start your car after running out of gas, simply turn the key from the "Off" position to the "Run" position. You should hear the pump running (whirring / buzzing sound) for 5 seconds or so if you listen closely; then return the key to the "Off" position. Repeat this 3, 4 or 5 times to allow the pump to prime and flood the all the fuel lines, filter, etc. between the tank and engine.

If you can not hear the pump, have someone crouch down low near the tank while your turn the key (remember - only turn from the "Off" to the "Run" position - not all the way to the "Start" position each time). If they can not hear the pump, the fuse for the pump may have blown. Check your manual for the location of the fuel pump fuse and replace if bad. If still not hearing the pump, it may have failed when you ran out of gas as the fuel in the tank acts as a coolant for the pump. If this is the case, the pump will needed to be replaced.

Finally, you may have luck rapping sharply on the exposed tank with a rubber mallet of block of wood (do NOT use a steel hammer or tool as any spark could be disasterous) when the pump should be running. If the pump is simply hung up on sediment, etc. the vibrations *may* cause enough movement to allow the debris to become dislodged - allowing the pump to run once again.

I hope this helps and good luck!

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You did put gas in right?

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