Prob not...remember the big part of the CEL's is for emmissions control....I had a CEL going because of an improperly calibrated MAF...otherwise the car ran great, perhaps a little rich...I've given up worrying about gas mileage along time ago..

LMK how you make out with the garage...it's been about 2 years since I had any work done (they did my head re/re after they were ported and polished)....the mechanic's name is Dan..

2000 Black SVT #2639/2760; w/18 OZ Superleggera's, Pirelli Pzero Nero. MSDS Headers,Quaife LSD, CF DF, Borla,,chipped,DMD,Baer Track rotors. Lowered/HR and Koni's; HPP & OMP 3L Valves w/ P&P Heads (thanks Kinger!)