I just replaced a crankshaft seal on my Audi A6 Avant Quattro (1999). After putting everything back together I test drove it .. pulled back in after 10 or so minutes of running smoothly.. started to sputter. I pulled a Cylinder 6 misfire code when I hooked up the handheld. Cut to 5 minutes later and the car is running perfectly and smoothly again. Now, I've only run it for about 30 minutes or so after I coded so I'm just waiting patiently in hopes it doesn't code anything else again. Is there something I should expect? or do you (anyone) think it was a fluke? Perhaps? Meh.. just scared now.

Thankx