Isuzu Repair: 2004 Isuzu Rodeo starts when it wants to, camshaft sensor, crankshaft sensor

Question
I have a 2004 Rodeo.  I have been having problems with it starting.  When I turn the ignition switch sometimes it will start on the first try,but then sometimes it will take 5 or more tries.  Sometimes it will attempt to crank then it will stall.  It can go for days without any problems, then all of a sudden it will act up.  I have to idea where to begin to check for the problem.  Any suggestions?

Answer
Well I would start with a fuel system pressure check. And then move to a problem maybe with a camshaft sensor or crankshaft sensor starting to fail, although if no CEL(check engine lights) are on then I would suspect that either the fuel pump or ignition switch is to blame Monica.