My 1986 rx7 NA since last week is starting to trow a little white smoke just when i turn it on in the morning, after a minute it stops. Also since then in the morning it kind of idles! It seems like it would turn off but it wont. Im all worried i havent changed the spark plugs neither the cables could that be a reason?
PS What kind of spark plugs you guys recommend?

 

oem NGK's

 

most of our cars give off a bit of smoke at start up and hate starting in the cold. might be a small coolant seal leak though