engine crank but no start

[Elmecano]

Hi Guys!
I just bought an 97 explorer 2dr v6 4l and I got some problem when I start.

when I start it for the first time of the day it have no problem but as soon as I turn off the key then try to restart nothing.....the engine crank but does'nt start then I play with the throtle pedal and I can start it.
I don't have any check engine light I search a bit on the forum and I was thinking about the crank sensor or the tps ??
I don't have any tool to check it for now so I know that it have spark it start on first time,it have fuel to, I listen the pump and it smell a lot.(I have a brand new batterie and starter)
so what do you think?

 

[2000StreetRod]

ECT sensor, IAC valve, fuel pressure

If it won't restart after warmup it could be due to a bad engine coolant temperature sensor. Also, your IAC valve could be dirty or you could have a fuel pressure problem.

 

[Elmecano]

hum ok....but for the coolant sensor I saw on the forum that the idle fluctuate but not mine so I will try to clean my IAC for now and I will see!!
thanks

 

[YBCold]

also check fuel filter