hey guys.

need some opinions on a problem i'm having with my car.

it starts up fine but as soon as I step on the gas it seems like it's misfiring and the CEL light keeps on flashing. didn't have time to check the code yet but i'll check it later.

does any one know what the problem could be. it's a 99 civic EX. thanks.

 

o sensor?? hmmmm

 

possible. i had a problem with it before. but the tech was blaming my header anymways, he just reset the ECU and it was fine. that was about 4 months ago. i'll try resetting my ECU later after work. Thanks for the reply!

 

any time bro...my damn o sensor always gives me problems...you may need a whole new o sensor and header

 

I've already removed my DC header and went back to stock a few weeks ago. Damn those sensors are so damn expensive from Honda!