When I don't start my truck (07 F-150, 5.4L) for over 24 hours I get a weird sound when I start it. It sounds normal cranking but when it fires up and I let go of the key I get almost a short (1 second or less) grinding type sound... similar (but not quite) to the sound you might get if you tried to turn the key when the engine was already running. Then it will not make that sound again unless it sits for a day or more. Any ideas? TIA

 

Sounds like your timing chian tentioner is loosing presure durring off time are you useing a motorcraft oil filter I here threr supose to have reley strong anti drain back valve for this as far as other filters go I don't know if they do or don't so Ive been using the motor craft but Ive read other post about this saw a ford trainnig video on flatrate tech. com about the same problem hope this helps good luck.

 

I just looked... right now it is a Valvoline VO-47. I will switch to a Motorcraft and see if that helps. Thanks.

 

Itried to check out the flatratetech site and all I get is gobbilygook and profanity. Maybey the site is having issues

 

I have had the exact same problem. I noticed it about two weeks ago. The truck did it two days in a row. After letting it sit for a while, I would hear the noise. If it turned it off and then started back up, the noise was gone. It only happened those two times. It seems to have stopped for about a week now, but I'm worried that something is about to break. I've had enough trouble dealing with the dealerships in the past few months, I'm sick of it. I have the motorcraft filter and everything is completely stock. I have the 5.4L V8 with 16,400 miles, scab 4x4 XLT.

 

Yep I have it too, it’s only happened 4 or 5 times in 15000 miles, no idea what it is. Never had anything but motorcraft oil and filters.

 

The truck did it again yesterday morning after sitting for about two days. Does any one have any more information about this? Does anyone thing that it might be the starting getting stuck or something like that?