I have a 1998 ford F150 5.4 4x4 it has a hard start problem. Only the first initial start every start after that is ok. I can try to start it in the A.M. and it just wont fire you can hear the engine just turn. Then I can use a can of ether and it starts fine. Here is the list of parts I have replaced plugs, coil packs, MAF, IACV, fuel filter. The stupid thing is it runs fine after it starts the first time....

 

is your fuel rail holding pressure it might be your fuel pressure regulator i would check that out first

 

ok will check that out whats the regulated fuel pressure standard for it (PSI)

 

Before your initial start, connect a gauge to the rail and turn on the key. It should prime to about 35 psi. The pressure should hold for at least 30 minutes.