The inlet coupling (torwards the bed of my truck) to the fuel filter won't come off! I got teh coupling torwards the cab off, but the bed side won't slide or nothin! Whats wrong???

 

I asume you are using the correct tool.

They can be a pain, push the tool in and then grab the hose and pull. Don't try to push the fitting off by the tool.

 

Hey you can cut pipe on the filter close as you can to the filter then hold it with pliers to push in the insert tool should come right out this is a common problem with Ford fuel filters at least for me it is usually a coin toss weather it comes off with just the tool
ggod luck
slick

 

Here you go, pictures and all
Good Luck
https://www.f150online.com/forums/sh...threadid=71442