Lost top end power

[bobtodd]

I'm just hoping that I havent been running lean on fuel How can the mass air go bad?....the sensor inside it? There is a fuel pressure gauge under the hood. Can I check WOT fuel pressure with the car sitting and reving the motor? What should it be at? I know at idle FP is at 40. As far as checking the timing, what plug is it that I have to pull from the distributor? I went out and looked and it looks like there is only one harness of wires that plugs into my distributor. Is that the one? I'll still check timing, but I havent messed with it since I got the car so I'm doubting thats the problem.
When I first had the car, all through second gear you could feel it pull super hard like it wanted to rip the tires off the car. After awhile it felt like that pull would be there on and off. And now I just dont feel it at all. It's not like there isnt anything there, but the power and the extent of the power through higher rpms isnt. I'll check to see if I could borrow someones mass air sensor. I've got 24lb injectors but I think there are some stangers around here with the same.
Could a faulty fuel pump or injectors be a culprit? I know its got a FMS high volume fuel pump in it. Not sure how big. The guy I bought the car from said the car is good to go as far as a fuel pump and that he planned to put a 150 shot of NOS on the car, so I am thinking the fuel pump should be fine.
Hmmmm...fun stuff. I guess I'll check some things out and see what happens. Any other ideas are appreciated. Thank you!!