I can be driving along and suddenly the economy gauge will go the red and there will be no power. This will happen for 1-2 minutes and then disappear. Happens occasionally but, today it happened twice on my ride home from work. This happened once at idle and it sounded like one cylinder wasn't firing or something (reminds me of an old farm tractor sputtering or a BRIGGS and STRATTON motor running, occasionally those motors have a type of cough so to speak)
The fuel pump hiss is constant during all of this and the hissing is normal for the car (pump sounds strong)

Any ideas?
spark plugs?
fuel filter?
bad gas?
OVP relay?
PLEASE OFFER ANYTHING YOU CAN!!!!!!!!!
I'M POOR SINCE ITS CHRISTMAS AND I AM A STUDENT
ANY SUGGESTIONS GREATLY APPRECIATED!!!!!