M Matt V Member : 2002 Mazda Protege5 Apr 9, 2010 #1 Would an MP3 run just fine on a P5 ECU or would it have any issues with CEL's and etc?
B bluemp301 Member : Blue 2001 MP3 Apr 10, 2010 #3 I don't think it would run as good either seeing that is a big part of why it made a bit more power.