help!! 91GT supercharged misses at high rpms

[RVGUY]

I have a 91 gt stock motor with 70mm t/b and 73mm mas air and all the rest is stock but the xpipe and full flowmaster kit. At higher rpms the motor misses but doest ping. I can put the car in park and rev it till the dogs come home and it wont miss? and comments would be great!!
www.91ragtop.stangnet.com

 

[shawn13]

So its just missing under a load!!! I would start with fuel pressure and fuel filter then plugs, wires,cap and so on

 

[speedytang]

Your blowing out spark. Gap plugs at .032 and wold recommend Autolite #23 plugs

 

[DJTR]

I agree

 

[1lx2beat]

really yea fuel presure and plugs! gata be ... but what would cause it not to have any fuel presure untill i purge my pump 12 times then it only holds pressure for a min or less.... bad ran fuel lines? if u need to kno nemore about this car ask im bieng crude...it has allot of aftermarket fuel sys and engine parts...thanx guys


ps: my pc is stock how can i get it recalibrated or do i even have to ... car runs like a bat outa hell!