piercings4_u

What's up peeps...I'm new here..Ive been having issues with my truck that I bought 4 months ago..I have a 91 4x4 with the 22re...it seems to start fine when the engine is cold in the mornings but if I go somewhere and come back out 15 minutes later it takes about 3 times to start it...the first and second trys it starts and immediately dies...the third try it starts and stumbles but smooths out and stays running...I was thinking it could be the fuel pressure regulator but I'm not sure...anyone have any suggestions for me...thanks in advance...