Check your fuel pressure when you are having the problem. Cold cranking draws a lot of amps and a failing fuel pump may not be getting enough current under those conditions to properly pressurize the system.

The fuel pump usually fails when warm....i would stick with the fpr diagnosis..also.its cheaper and easier to replace.....

yes its really really hard to start the car the next morning but once it starts after a few tries the runs well once it warms up

If it was the fuel pump it would run terribly when warm....cold startup is usually the fpr

It'* the other way around. When a FPR fails it is usually the diaphram that leaks causing fuel to be sucked through the vacuum hose into the manifold causing a rich start condition. Somewhat like starting a carburated engine with the choke on (starts fine cold but very difficult warm). This would not apply in the unusual failure of the FPR sticking full open.

A weak fuel pump on the other hand may not be getting enough voltage to pump enough pressure to start the car when the starter is drawing so much voltage during a cold crank. That said, I have seen fuel pumps fail in all differnt conditions.

My friends jeep did the same thing and what I told him to do is have the key in the on possition then turn the lights on for a seccond to start the flow of electric then try it and that works fine for him to get it started

this morning my car wont start at all, i know its my fuel pressure regulator giving me the troube, yesterday i had the same problem it took me awhile to get the car fired up, now this morning it cranks but wont start, i just don't want to wear out the starter,