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1999 911 vacuum line question

  • 1999
  • 911 Carrera Cabriolet
140 000

Just bought this car this past week. I think I got a really good deal until it began to idle rough. Right now the only modifications I can see is a K&N cold air kit. I am planning on replacing it with the stock airbox. I have several codes coming up, alot of miss-fires. Today I replaced all the plugs and found nearly all the coils were loose and being held in with only one screw. I found what I am guessing is a vacuum line hanging around the rear cylinder on the drivers side, if anyone knows if it is a vacuum line or merely a drain line please let me know.


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