Spark plugs

[sr kid 88]

ok so this morning i pulled out my sparkplugs because i am going to get dynotuned and 3 out of the 4 are black and 1 just has like a white tint to it on the tip could this just be from a spot in my tune or would i need to do some replacing

[ZL-Auto]

What plugs are they, we use the BKR6E in nearly all SR20 cars.

[supreamS14]

white is knock which will kill your motor : ! That cylinder's injector might be starting to go out or not performing 100%. If its running ok then you might be able to get your fuel and intake cleaned by a pro ! If its running poor that injettor might be bad or cloged up. DONT RUN IT HARD !!! I use fuel injector cleaner , octane booster by nos AND 1 step colder spark plugs ! NGK BKR7exi I think is the plug part # I use PLEASE DONT your sr