I replaced the Crankcase Vent Valve last weekend and about a day after completing the job, I developed a pretty bad rough idle. I had a local parts store scan with an OBD II reader and they pulled codes 0306, 0300, 1347, and 0174. The rough idle worsened to the point that the car became sluggish while driving and was missing quite badly at idle. I removed the DISA actuator unit, cleaned it with carb spray, and carefully reinstalling ensuring the rubber gasket seated correctly. The SES code cleared right away and the car ran perfectly for about 24 hours. This morning, the rough idle returned and after a 15 minute drive to work, the car was running quite poorly with the SES light back on. What are the chances the intake actuator is shot? I have 68k miles on the car and no idle issues before replacing the CCV. I removed the actuator unit for the CCV replacement so it's quite coincidental that I now have an idle issue. I did notice while cleaning the actuator that the flap occasionally hung up after manually twisting it closed. It would stick in the 45 deg vs. full 90 degree position but I thought this may be due to some carb cleaner interfering with the bellow while wet. Any ideas on what else to check would be appreciated before I drop $200 on a new unit. Thanks.