ka wont start

[240ss]

So i went to home depot the other day and when i got back in to leave, it ran rough. i knew right away it was an injector because i took the plug off the second injector and nothing changed. drove it home, went and bought a new injector, put it in and now it wont start. but, when i first put it in, it ran.....SUPER rough for only like 3 seconds with the throttle mashed down and thick white smoke billowed out the exhaust that smell like gas.

and by the way, it ran perfect before this happened.

I AM STUMPED!!!!!!

any input would greatly appreciated. thanks

[Riken]

Check your plugs wires and Dist. cap and rotor. Your plug could have been toast but the leaky injector made it so you didn't really notice. Once you fixed the injector it can make a spark for shit. Also, make sure your other injectors aren't leaking now from when you took off your fuel rail.

[240ss]

i didnt take off my fuel rail. i just replaced the one injector. i also just got new plugs and that didnt make a difference either.