Sorry im a douchface but heres my problemo. All the sudden lately my car is running leaner than usual except under full boost(which it sputters and cuts from rpms 4300-5300). but if i go thru the rpms 3/4 throttle it never cuts but at around 7 psi my a:r's are 14.4ish instead of the usual 12's. and now when im in vaccum around -10- -20 accelerating my a:r's are in the mid 16's instead of usual 14's. its like i got a whole new tune to be lean. im picking up a new dizzy next week hopefully and hopefully that cures the poblem. whats it sound like to you?

 

a dizzy wont do jack shiite.

You could have a clog in the fuel system
MAP going bad (not very likely)
vaccum leak
failing fuel pump (not very likely)