[MySallyMI]

Ok come to find out i was on a mission all weekend for a part that doesnt exhist for my 03GT. So if anyone tells you you need a Adjustable fuel Pressure Regulator on a 99-04, ill tell you right now, your fuel pressure is controlled by your computer. I feel like such a dope. I took the dyno tuners word for it and began searching and asking everyone i knew about this thing, and come to find out it doesnt exhist. I called him up today and he said, "yeah after you walked out the door i did a little research and found that out too". While i was thinking nice of you to tell me! lol anyways, im still trying to figure this one out. I hit the throttle to rev it up and it sput sput sputs then revs impressivly to Red line. I dont get it, but im bringing it back to the dyno next monday so he can figure it out, unless anyone has any suggestions. Look closely at my dyno i posted here last week, its nothing like Acmillr's, i got a jagged line all the way up. Im getting frustrated and have already hit broke. I thought modding was supposed to be fun...this sucks, i miss my car.

[acmillr]

I'm not sure you shouldn't find a different tuner. This guy doesn't know what's going on, if everything you say is true (which I have no reason to doubt).

[ChrisJ]

I would defiantely look into a different tuner...

Also check for any vacuum leaks...

But it really sounds like your tuner is in-capable...