are you throwing any codes?

if not... check for spark in every wire by pulling on plug wire out and putting a screw driver into the end of the plug wire, set it down by a ground... have someone crank your car and you watch for a blue to white looking spark jump from the plug wire to the grounding point.
if it throws an orange or weak looking spark... or no spark at all... ur coil could be going out.

if that checks out good, check your fuel filter by loosening up the test screw on top of the filter.

if you are throwing ANY codes at all... it would be smart to fix the sensors that are bad... and then if the problem still occurs... do these tests i just listed.