Where is Throttle position sensor on eclipse gs?

Alright, so I have been having a ridiculous problem that has been PISSING me off. To start with, I am getting 70 psi from my fuel system (holy crap!) At an idle i should be at 38 psi. So...i did what anybody would do, i bought an adjustable fuel regulator and tried to fix the problem that way. Well i still have 70 psi. No matter what i do to adjust the regulator nothing changes. I put new plugs in, and it fired right up and will idle fine and will rev up fine as long as it is in neutral (for the most part, and may just be a coincidence). Once i start to drive it, it usually will go 100 feet and die. Now, the car won't start up right after it dies. I have to wait say? 5 minutes and it will fire up like it's new, go 25 feet sputter and die. My plugs are totally black by now. What i believe is happening. My fuel system is sending to much fuel to my rail and causing my plugs to become engulfed in fuel and once completely covered they can't get any spark and the car dies. So, a buddy who knows what he's doind recommend i get a new throttle position sensor, a real mechanic told me to pull the tps out and see if it fixes anything. I don't think it is going to fix my high fuel pressure but the one telling me to get a new tps is saying it will bring it down. Thing is, i dont even have to have the car running, if I prime the fuel pump twice it will already be at 70 psi. Can anybody help me? This has been 2 weeks of my life trying to fix this problem. I have tried everything i know and now it's time for some help. And does anyone know where the throttle position sensor is located? The car has a cold air intake and a full exhaust system.