On a 95 explorer w4.0 engine cranks along time cranks at normal speed before starting i replaced the plugs wires and fuel filter on the frame the old spark plugs were white but gapped ok any sugestion?

On my 1995, if my engine doesn't start right away, I turn the key off and try again in about 10 seconds. I was told that sometimes it misses a "pick up point" but it has always started on the second try, and it only happens occasionally, so I've never worried about it. The owner's manual states not to let the starter crank for more than 15 seconds at a time with a cold engine, or 5 seconds with a warm engine. ( I'm not a mechanic but have you checked your fuel pressure ? It should be 35 to 45 PSI with the key in the on/run position but engine not started)