I ALWAYS buy fuel from somewhere with high turnaround, a very busy gas station that you see a lot of other people getting their 93. Little gas stations that don't have a lot of turnaround, especially on the fewer use 93 pumps, can screw you. How is your fuel filter? Does it smell rich?
94 Z28 M6 hardtop power nothing LS1 lid, ported MAF, Pacesetter LT's, ORY, dump, 7/16 NSA Pro Mags, CSR EWP, Bilstein HDs, BMR springs, 32 front 23 rear sway bars, MSD opti, NGK TR55s, Taylor 8.2mm, B&M ripper shifter, underdrive pulley, Trifecta tune, LT4 KM, Poly LCAs and short TA, 3.73s, 295/35/18s