SERIOUS need of HELP. My Mechanic can't even Figure it out**

Ok.. I don't know why I didn't come here in the first place. I have a 95 5.0 GT and the last few days its been randomly cutting off while driving, and now while idling LOL and NOW When i stick the key in the ignition everything lights up turns on acts like its fine but when I turn the key there is plenty of sound but it just will NOT start.. it acts like it wants to but like something is not connecting. .November I put in a new Transmission, I changed my sparkplugs last week, I just yesterday had the fuel Pump and filter changed and he ordered an expensive a$$ inlet Gromett (65.99) because he said mine was busted.my mechanic said it would stop after that. it did for about and hour. but it went back to exactly what it was doing before it was fixed. I just graduated School and can't afford another random shelling out of hundreds of bucks. (lol this time cost me $600) but DANG IT if I must.. I love my BABY So ANY help will be greatly appreciated. Or if any of u have any questions I can ask him about the car just in case he hasn't figured something out. It sounds like it could be simple because my car works perfect other than this recent decline. As of today ( I had it towed back to the shop today his expense) he said it worked fine for thirty minutes THEN cut of.. and it makes no sense. He said I had no fuel pressure before (which is why he replaced the fuel pump and filter) and now its fixed (the pressure is plentiful now).. but I don't know WHATS goin on. Alot of you seem more knowleageable about my car than my mechanic (from what I have been readin) So anyone LOL Throw out all ya got- Ms. Minx