Re: where is the mas?
How about the MAF (Mass air flow Sensor) which would be between the Air intake manifold andthe Air filter housing (use a MAF sens. cleaner or Electroinic contact cleaner. No finger contact. you can remove the o2 sens & douche it too.) You remove the EGR to access the ports & portway through the valve. Disconnect battery for 5 mins. to rebuild the KAM (Kept addaptive memory) to expidite seeing the total benifits of your labors.