Hard start on f150 99?

Question

already changed spark plugs and coils. people keep on saying its the fuel pump but there isnt any hissing with truck on and open gas cap.

Answer 1

Here's a thought.  I had a hard-starting problem on a Dodge van that was about the age of your truck.  It would crank for about ten seconds, then finally start.  It turned out to be a split rubber hose inside the tank; it went between the pump in the tank to the fuel line outlet on the top of the tank.

I put a pressure gauge on the fuel line just before the pressure regulator and I could see the pressure SLOWLY building up, instead of shooting right up as it should.  That lead me to pulling the tank to test the pump directly, and that's when I discovered the split hose.

Modern fuel-injected, electronic ignition engines usually aren't "hard-starting"; more often they either start or they don't start; so this might just be your problem.  Could be a worn-out fuel pump, or lift pump if you have one, but they usually just burn out instead of getting weak.  

Good luck.

Answer 2

could be a pump...have the pressure checked and check the fuel pressure regulator and the fuel filter

Answer 3

replace the fuel filter add fuel treatment