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04 5.4L new body style.
Last year when it was cold out I had what I thought might be a fuel pump issue. I could hear a "whining" sound from tank/pump area. It was making this sound when I would let off the pedal mostly not so much just sitting still. Fast forward to this year and with some colder weather I'm getting this hum/whine/sound again...
If I replace fuel pump assembly do I drop the tank or lift the bed? I'm thinking drop the tank but a friend mentioned lifting the bed on some trucks.
And if it's not the pump what the heck is it???lol
You can do it either way drop-tank/raise bed. You'll need more lifting help to get the bed off. I've had pumps whine for years before failing, and for weeks before failing. You could just wait for it when there were two tanks on our (older) F-150s. Now you could get stranded when the one and only pump fails...
'06 F-150 STX, 4x4 4.6, going strong
'92 F-150 XLT, 4x4 4.9, killed by cell phone driver
'73 K-20 Custom, 4x4 350/350 My 1st truck, sold, wish I still had it
i hear a whining noise myself every now and then with the colder weather. most of the time its on the highway when i get above 70mph, i just back off the throttle a bit and it goes away. but it is sporatic and the cold weather definately has something to do with it. never a problem above 25 or 30 degrees. my 06 4.6 has about 38,000 on it and the noise has been popping up every now and then for the past two winters. when it breaks ,i'll get it fixed,,, just hope i'm close to home.
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