Faltering Saleen

So I was driving my 2001 Saleen S281 through the mountains of Northern New Mexico today and it was doing fine but then all of the sudden when I was in 3rd gear and rolling on the throttle it started to ... well for lack of a better word "cough". It would pull, fall on its face, pull fall on its face and so on and so forth until I let off the throttle. I found this a little odd, backed off and it cleared up. Anyway, about 15 minutes later coming up a curvy road over a pass it did it again but WAY worse. If I pressed the gas pedal down anymore than just slightly past idle, RPM's and power dropped to damn near nothing. I could press the pedal JUST slightly beyond idle and it got me to the top of the pass where I turned the car off and then tried starting it again. It took it a bit to start but it caught. Any ideas?

I just had the car at Fritz Ford in Riverside and had them completely service it, oil change, brake job, the works. It had been sitting for two years when I got it at the beginning of the summer. Everything was running fine back in Cali though my bro Slapyo said that he thought it did the same thing to him from time to time last time it was up and running. The "newest" car I've worked on in any depth was a 71 Nova SS and a 65 Mustang Fastback so this newfangled computer **** has me stumped. I'm not sure where to start on this thing.
 
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Is this the supercharged model or the N/A 4.6L engine?

IS there a check engine light on?

From what you wrote, it almost sounds ignition related, like failing COP's. However, they would trip a CEL which is why i asked if the light came on.
 
You know, I was wondering about that too but when my brother said he had it do it to him a little back in Cali I figured the altitude might not be the problem. Then again, I dunno if you have to retune these cars when you change altitudes like you have to retune and rejet a carb.
 
you might check fuel pressure. A failing fuel pump can produce exactly that kind of running problem.

Check the fuel filter first. But I agree it could be the pump as well. Ignition problems are usually very abrupt, and cause violent bucking. Fuel system usually more of a bog with little or no bucking. Could also be plugged exhaust, cats maybe.
 
Well, I'm going to check my paperwork from Fritz Ford and see if they replaced the Filter. If they didn't then I'm going to buy one, along with a new fuel filler hose, because I got pulled over while hauling through the mountains by someone saying I was throwing gas out the rear end every time I hit a left turn, and replace them both and see how things go from there. Hopefully they'll work out. I imagine that if its the original fuel filter still in it then its probably fairly gummed up.

If the Filter doesnt work, I'll pull the chip ... btw where is the computer on these things? Heck I had to ask my brother where the fuel filter was. I'm used to it all being in the engine compartment and me being able to climb on down into it to work on the engine.