Just had tune up 1 week ago
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1999 Infiniti Q45 Question: What causes my car engine missing when car is idled?
Answer #1Anthony2998 from Tires & More Complete Car Care, December 08, 2011, 05:59Technician
It could be numerous items causing issue,least expensive route is to start with checking for vacuum leaks.
Answer #2mastertech6371 December 08, 2011, 06:21Master
i would return to whrer you had your work done and have them re check it for you to verfiy there work.
was it missing before the tune up??