75 mph + or -

[Mad Horse]

I don't know if fuel starvation is your problem. I would check your fuel pressure and possibly your fuel regulator also. If it is fuel starvation you could fix it by buying a bigger fuel pump like a 110lph or something of the sort. Hope I helped.

PS. I suggest buying a fuel pressure guage if you really think it is fuel problems. I would also try a tune up (cap, rotor, and plugs if you have not done so lately. This can solve many of problems.