okay so i installed headers and a dp, and i put spark plug fowlers in before i put the o2 sensors in. but still im getting my check engine light to come on. Do i need to layer two fowlers? Also my friend works at a shop, and he checked my car and it said "slow read?" something like that, but if you know please help me asap.
thanks

 

what's the engine code?

 

lol hey, i already responded to this with my video on youtube. the only thing you can hope to do is use the fowler in the rear sensor position and hope it doesn't come on. your code will read bank1 sensor2 slow response thats because the fowler lifts the sensor out of the pipe and can't get a good read. Our Mazda's are sensitive bastards the only way to fix this is throw a racing cat in some where and extend your 02 sensor wires

 

okay thanks .mzdaspd304.
im actually thinking of just installing stock headers back in, but i have a prob getting one of the original second sensors out ha.my luck