Car won't start when warm

Hello everybody.
Hello, Sienna09,when
engine warmsUp,it starts4
30 sec and shuts off like
there is no more fuel. The
car will keep cranking and
it won't start. When i
spray startup liquide , the
car will crank  and start
trying to keep my foot on
gas pedal and it feels like
there is no fuel on the fuel
lines.
Once, I unplugged  and
plugged fuel line hose by
Fuel Rail, i felt pressure
coming up" felt lots of air
and some fuel"  I then
cranked the engine and it
started within 3 seconds
like a charm and ran really
great. Now whenever my
car won't start when
warm, I just unplug it and
plug it back and it starts
and I don't have to wait 30
minutes.
By the way, the car starts
every other time when I
lesve the car for 30
minutes or more when it
us warm"Temperature
under the mid gauge"
Could it be fuel pump or
pressure regulator or
could it be fuel tank vent
or canister clogged?
Thanks I'm advance.

Adam