I installed a cold air intake in my mazda 3 2005 2.3L and it cause my check engine to come on I did take the negative battery term off and reconnected it during the install proccess, then I took it out and put the stock back in to see if it would go off and it doesn't. My car isn't accellerating that well anymore. since the intake install. Anyone know what could be wrong and what to do so I can install the intake? My friend said it's probably the fuel air ration that's messed up???

 

thats exactly whats wrong u need to leave the bat off for at least 15 min then plug it in and it will be out of wack for a while till the ecu re programs itself to the new fuel air mix