How tight are the fuel lines to the fuel filter supposed to be? I can't pull them from the top or the bottom, and i'm pulling very hard, any suggestions?

 

When they sit attached to the filter, they become very well stuck-on. Use some pliers and clamp on near the end of the nipple; twist back and fourth until they lookse their bond. Don't pinch the hose too hard or you'll end-up making it leak. The afforementioned works best when the filter is still bolted to the car. If it's unbolted, pinch the hose after the nipple, hold the filter in your hand and twist opposingly until it breaks free.

After it breaks free, use the same back-and-fourth twisting motion in combination with a pulling motion to slip the hose off. If it was really stuck on, it'd be advisable to get some NEW fuel-injection-rated hose (Make SURE it says fuel injeciton hose rated at 90psi or above) while you're at it. It's sold by the foot at any automotive place. Pick-up some new hose clamps too; those springgy ones are junk and should be replaced or it may leak.