Back again with more issues, lol. So my little sister calls me and says that her car isn't running. After getting it to my work, I find that it will start, rev to 2k, and immediately die. Only way to keep it running is to keep foot on pedal. Did notice that if I barely hold the pedal it will suddently rev all the way to redline until I remove foot. CEL on, codes PO440, and P0455. Emission codes that have been there since we got it (N80 valve). No vacuum leaks that stand out. Disconnect MAF and vehicle will idle on its own along with small backfires through intake. Replaced with a new Bosch MAF and same problem occurs. Did notice connector to MAF isn't in perfect shape, the red plastic portion of inside connector is missing, (might be problem?), Plugs and wires have been replaced along with new timing belt, tensioner, and water pump. No battery issues prior to this problem either. HELP!