After getting a bad tank of gas today, I noticed my SVT under accelerating. Also, when I accelerate over 6K I hear what sounds like a metal-on-metal sound coming from what I think is the intake. Any ideas?

Ben
98 SVT

Ben Epstein
98 SVT #248
KKM Intake
Magnaflow Race Muffler
Boston Acoustic Components
Xenon Headlights
Voodoo Shift Knob