"Turn the key to the on position but DON'T start the engine. Now press the gas peddle to the floor SLOWLY and let it come up/back as fast as you can, turn key to the off position. Now do this two more times. Now start the engine and go for a test drive"

worth a try...

 

What is this suppose to do? I've never heard of this before

 

Here is mine. When I'm driving if I keep the rpm around 1000 the truck will feel like it is skipping. I think may be a plug issue. Next occasionally when I go to start it, it will turn over but wont start. As strange as it sounds if I put the pedal all the way to the floor and let it come up. It will then start.

 

I'd love to hear what anybody finds out on this issue. I have a 2005 5.4k 160k miles and it seems extremely gutless. I had a 1999 5.4l with 260k miles that was WAY more peppy than this truck. I just replaced all 8 plugs with Motorcrafts, didn't seem to change anything. I am wondering if my truck needs the cam phaser job done though.

 

Just changing the airfilter helped to lessin my power loss

 

This resets your computer controlled throttle body which learns how you drive and only opens so far after a while. Did it to my truck, woke it right up! But you also may have a "cop" or coil that is on its way out, only noticed at low rpm's and under load.

 

sorry for such a late response but did you check your motor mounts? Mine made a similar sound at that rpm and one was a little loose.

 

Hi everyone, I'm looking at buying an 04-08 f150 with the 5.4. Can anyone tell me what the chances of me getting a bad engine are? Is every engine affected by the cam phasers/tensioners/injectors? I'd like to know the chances of having to spend thousands in repairs before I sink $15k into a truck.
Thanks!

 

I have one for yahs, if anyone has seen this one. The beast is a 05 F150, 5.4 4x4 w/73k miles. Been a great truck, but I'm losing respect for it slowly as things start to show up. I have checked and as of now replaced all idlers and tension roller along with a new serp belt. No help. The alt bearings are dry, but not squeaky, yet. The squeal almost sounds more like a purring sound, almost like letting the air out of a balloon being pinched off. I've been able to trace with a stethoscope to the intake manifold, drivers side. Used starting fluid to locate a leak, found zero!! Now, before anyone says its the belt, I'm positive its not. I traced it with the belt off and a cold motor. It changes in intensity, but not with rpms, or vehicle speed. I always have the weird crap happen to my vehicles!! So if anyone has any clues let us all know! Thanks D

 

Thanks for the links.