Post by
duffman1278 »
https://forums.nicoclub.com/duffman1278-u61344.html
Sat Sep 05, 2009 9:05 pm
Run a compression test to verify that your head gasket isn't blown, white smoke could be, as mentioned, coolant being burnt in the combustion chamber.
Black spark plugs could be a number of things such as running rich or the spark plugs you have are not the correct heat range.
What spark plugs are you running?