Nissan Repair: 94 nissan altima, nissan altima, spark plug

Question
engine shakes on start up and gets worse when it is but into a driving gear. car is a automatic. was just recently tuned up. any idea on what it can be?

Answer
Hi Mike -

I will need more information please -
Is the car running rough because of the tune up, or did it start at a later time? Can you pull a spark plug and let me know what color the electrode is? Brown, white, black? When the car misses, is it a steady miss, or does it buck?

Please let me know -
thanks
calvin