04 gt starting problems

[borst24]

when i start my car cold it starts up fine, but if i start it warm especially if its been sitting for a half hour or more and on a slight incline it stutters real bad and sometimes doesnt start. any ideas? i test drove 3 04 gt's and 2 of the 3 did this and now mine's starting to.

[Reptile]

When you turn the key on, do you hear the fuel pump prime?

These did have a problem with the fuel pump bleeding back and losing pressure. It could also be an electrical issue since the car only does it hot. Might want to check all of your electrical connections under the hood.