1990 GMC Sierra

[Bailey 5542]

How do you do a fuel test on a fuel pump

[Bailey 5542]

How do you do a fuel test on a fuel pump

How do you do a fuel test on a fuel pump

[Bailey 5542]

Can you please tell me how to fuel test a fuel pump

[Bailey 5542]

Can you please tell me how to fuel test a fuel pump

[Bailey 5542]

How do you do a fuel test on a fuel pump

[nht mike]

Remove the fuel fill cap. Turn on the ignition. You should be able to hear the pump run in the tank for about 15 seconds. If you don't hear it get a 2X4 or a large dead blow hammer, and tap(!) the bottom of the tank while cranking the engine. A lot of times that will jar the pump and get it going. If that doesn't get it started, remove the wires from the top of the tank and check for 12 volts when the ignition is first turned on.

 

Mike

[502ci]

How do you do a fuel test on a fuel pump

How do you do a fuel test on a fuel pump

 

Good thing somebody answered...I could almost hear the person's feet stomping asking the question over and over only minutes apart...

[txab]

https://www.youtube.com/results?search_query=1990+gmc+sierra+testing+fuel+pump