Help!!!! TRD cutting out at cruising speeds.

My Truck is having a funky problem!!!! It's a 98 TRD. V6. What is does is it runs and idles just fine.The tack doesn't tick or fluctuate at all. When I cruise at about 2.25 grand it cuts out or kinda stalls. It accelerates just fine and smooth but once I start just cruising along it cuts out. It's not concistant either. It's very intermitten. I've changed the fuel filter,Air filter and reset the computer. I think that it all started happening when I changed the Throttle position sensor. I don't know for sure. There is no check engine light or anything visible wrong. What do you guys think?

 

is it cutting out like its not getting enough fuel?

 

Kinda, But If I mash the gas it doesn't hesitate or stall. It is really weird. If I accel up to lets say to 2500rpm then coast a little it will cut out just for a second After I drop a little rpm. Then I push the gas again and it picks right back up. It doesn't do it under a load...It's really starting to frustrate me.

 

Ok, Talked to the Toyota dealership and the mechanic said bring it in for 98$ they will tell me exactly what it is.... I did get out of him that he is leaning towards a TPS....What do you think?