2004 F150 acceleration problem - HELP

[khopson]

I have a 2004 F150 FX4 with a 5.4 and 3.73 rear end. When I hit the gas, there is about a .5 second delay before she starts going. WHen it does, it seems to stutter a bit then go. When driving and hitting the accelerator to speed up, the same thing, a delay and then an unimpressive increase in power. The dealer says it is normal due to the "drive by wire" gas peddal. I drove the exact same model (but a different one) at the dealer and it was totally more powerful that mine. This is what I expected the 5.4 to feel like. Not the dog that mine seems to be (I swear it feel like a V6). Any ideas out there as to what the problem might be?

[97chevyman]

try changing the fuel filter and run some sea foam through it. It is still under the 36/3 warrenty? Try the filter and the injector cleaner and go from there. Are you getting normal gas milage?

[khopson]

Originally Posted by 97chevyman

try changing the fuel filter and run some sea foam through it. It is still under the 36/3 warrenty? Try the filter and the injector cleaner and go from there. Are you getting normal gas milage?

Yeah it is still under the 3/36, but the dealers don't like to spend a lot of time on warranty work... The verhicle only has 5K miles on it. Could the filter be bad already?

[venture1996]

My 2004 150 5.4 has the same problem. Dealer blames drive by wire "improvement". Also encountered a rough idle problem at 350 miles, dealer said it could not be duplicated. The transmission also seems to not know what to do when you try to pass. Defective tires, 2 bad windshields, damaged trim due to previous reference, rough idle, engine stumbles, 11 mpg. Good thing I didn't spend $4000.00 less on the Dodge. Lastly, I have the payload package with 7 lug axles, no aftermarket stuff available.

[ModMech]

There are few things in play here.

First, ditch the fuel filter and sea-foam ideas, they are TOTALLY pointless on a new vehicle.

Now, the engineers (NVH) had certain things programmed into the drive-by-wire software to prevent excessive driveline vibrations and clunks upon hard acceleration. This changes with gear ratio, wheelbase (6', 8' beds, standard cab, Super Cab and Super Crew) and also with 4x2 vs 4x4. So, when you say you drove the "same" truck, EXACLTY how identicle was it REALLY?

Also, the traction control system (torque limiting) will prevent excessive acceleration (will absolutely PREVENT wheel spin on dry pavement... as in NO burnouts). This management will often feel like a mis or studder, and slow acceleration.

This all about NVH and "Big Brother" (Ford) controlling and monitoring EVERY aspect of how YOU DRIVE.

[WickedNYCowboy]

Its the cruddy drive by wire. Dodge had the same problem with the hemi when it was first introduced. Well the .5 or delay atleast.