hay guys i own a 97 honda civic LX. recently the car hasent been running very good. it dosent want to start at all in lower temps. and when it is at high rpms it seems like it is misfiring. ive replaced the plugs, wires, distributor, fuel filter. the car is almost completely stock all i have on it is a intake that i made, and a aftermarket muffler.. any help or advice would be greatly appreciated.

Thanks,
Matt