Question about 1997 Ford F150 Regular Cab
Your truck is up in the air, maybe you could easily disconnect the fuel pump harness while the truck is running, or just pull the EFI fuse so that the fuel system will empty somewhat. Withe the engine not running you can also bleed the system carefully to get it so that when you turn on the ignition (not to start, just to on), you will hear the pump only. Turn it on & off in 3 to 5 second intervals at each position or even better, have someone else do that while you listen through the fuel cap opening (cap removed) & you'll know what the fuel pump is sounding like.
Going bad, they just run weak and low on pressure which you can test using the fitting in the engine compartment. The sound will be slower but hard to really tell the difference until they really start getting weak & slow.
Really Bad ones usually don't make noise, at best a hum without that "vibration" sound.
Posted on Feb 05, 2010
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Posted on Jan 02, 2017
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