Originally Posted by
pizzaguy
Post 2 may have your answer. But I will offer my story...
My Crossfire is fine, but my Ford Ranger does this - a warm engine means CRAZY cranking to get it started.
When warm, the truck starts easily if I do this:
Get in truck.
Turn key to "ON".
Wait 5 seconds.
Turn key to "Start".
It then starts fine. Try this. If it helps, I think it's time to monitor fuel pressure when starting. With a new filter/regulator, I can't imagine what is wrong, but that's where i'd start.
My vote goes to it being a bad fuel pump, when the car is cold it starts on a rich mixture as lots of gas is supplied to the injectors and later after a drive the car is warm and the injectors get much less fuel. If the pressure is low it will not get enough fuel so it refuses to start combustion.
Check the fuel pump pressure.
Just hearing the pump means it is working but only just,