TPS or fuel pump problem?

[spddemon]

I have a 2004 1.8s sentra and I think my throttle position sensor is going out on me again. It cut out on be completly before and the dealer cleaned it out and it worked fine until about 2 months ago. Since then my car has been hesitating when I hit the gas, Would the TPS be the culprit or could I be a victim of the fuel pump issue? Also what size are the dash lights one of mine blew when I swaped out my sterio.