How To SeaFoam 2004-2008 5.4L Ford F150
Here is a quick vid of how to SeaFoam a 2004-2008 Ford F150 5.4L V8. The best way to do it that I have found is through the Brake Booster Line, as it feeds all the cylinders at once.
Disconnect the Brake Booster Line, or whatever Vacuum line you plan to use. With the engine running, start feeding the line into the bottle to suck out the fluid. You will have to have someone inside the vehicle to keep the RPM’s between 1600 and 2000. Going over wont blow your engine or anything, but it doesnt allow the fluid to fully saturate the components.
After you have sucked up the amount of fluid that you want to use, turn off the engine and let it sit for 5 minutes. After the 5 minutes, go ahead and start it up and start revving the engine as you see in the video. This will clean out most of the gunk and buildup, but like I said in the video, after the smoke starts to dissipate, take the vehicle for a drive. Punch it once or twice to make sure to dislodge all the extra crap.
This stuff will work wonders. You will notice a smoother idle and you will gain a bit of power that has been lost to the carbon buildup in the engine.
Sorry for the undershirt and shorts, it was a lazy Saturday haha.
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