proper spark plug gap for '95 Intrepid 3.3L

[95astroman]

While checking the spark plugs on my '95 Intrepid 3.3L I noticed what appeared to be a large gap of .065". All plugs looked fine with a light brown appearance in the spark area except one plug that had a black powdery look.
I couldn't find what the proper plug gap is. I even went to the Champion website and they didn't list the size of the gap for their own plugs.
What is the right gap and what would cause the powdery black look on one plug?

Thanks again.............95astroman

[Diesel nut]

Id say thats probably right. The black plug could be caused by slight overfueling by a sticky injector, sticking open more than it should. Try some seafoam injector cleaner or berryman cleaner. Either one works pretty good.