hey everyone i been having an issue now and then with my car. first of its an 04 coupe AT with 81,500 on the clock. Every so often at start up only when sitting over night its will smoke for 3-5 sec's and it runs smooth when smoking no missfire or anything that would give me i sign. Now it doesnt happen everytime. It did it a few times about month ago thats when i first saw it then it stopped. It also did it over a week ago 2 days in a row in the morning and now hasnt done it again. once it stops its good all day with no issue. i had a friend fallow me and i beat on it tried everything to see if it would smoke with no issue. I dont think its a valve guide seal or it would be a normal issue. Any issue known about these motors that may be causing it?

 

What color smoke? With your mileage have you changed the plugs yet? How often do you change your oil/filter? With your mileage you don't want to be "beating" on her....the results could get fugly!
Gary

 

Infinity or Nissan does all my maintenance unless i decide to do it. plugs where changed at 65-70,000 miles. the smoke looks to be white with a bit of blue that tells me oil but it only does this every now and then on over night startup.

 

The only other thing that could of caused it is fuel injector cleaner. Maybe sitting over night whatevery was laying in the injector caused the smoke on startup.