welcome to the site. I'm not one of those guys that's blown, but have you checked the blow-off valve? Iirc, yall still have the same vacuum modulator on the firewall side of the engine as us N/A guys, have you bothered to make sure that modulator is still good? lessee...what else is vacuum related up top around there...EGR? MAF? MAP? There's a few lines up there, chase em down and inspect closely for tears, rips, holes, breaks...ya know...good luck.
Hey, guys, there's a vacuum modulated idle speed controller, isn't there? iirc, my 00 has electronic idle speed control.
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WizAire CAI w/9" K&N & HV3, 2.5" d/p w/h/f cat, Cobra CB, PowerSlot slots w/Hawk HPS, GR-2s, GMPP handling kit, NextLevel STBs, Pilot Sport A/S Plus tires.
98 L36/MM5
RaC