sparkplug color

[puginfo]

>>> i run a water injection setup now and find that the spark plugs tend to have a rusty type of appearance on the - ve electrode outer lining and the porcelain nose. Is this normal or something i should look into? the car runs fine on boost with no stumbles etc and i use water from the tap.

 

[fast eddie]

Light brown or rust color is what you want,black &white no good
Ed