Not sure if this is where i should post but it seems like it is, The car and engine is a 94 civic hatch with a 99 gsr motor, recently i changed the spark plugs and the 1st-the 3rd cylinders were normal color then i got to the 4th cylinder plug and i was black, im guessing this means i have a faulty injector, this could be why im running rich even after a tune. What im wondering is should i replace the injectors with stock size of 240cc, or should i go up to a 270cc, or a 310cc, and what would the reason be for me to go up or stay, thank you in advance.

 

Bigger injectors aren't going to do much right now, because with more fuel, you need more air to give you the extra hp. You would want bigger injectors if you were going to do more to the motor, but stock or maybe a little larger than stock should be okay if you aren't going to do much more to the motor. Good luck.

-Shane

 

will i have the basic mods of intake, jdm itr header, 2.5 in hiflow cat with apexi n1 exhaust, but i am proboly going to just go with the 270cc, What do you think theses should be fine if not more then enough right.