Boxster base idle dips every few seconds

[LuckyOreo]

Hi,

I just replaced the AOS and the spark plug tubes on my car, and now I'm getting weird idle behavior where it dips every few seconds. Anybody know what's causing this?

Short door open
https://youtu.be/-jKeGEcdWko

Longer version door closed
https://youtu.be/gl5PkdrCKbk

Thanks

[78F350]

I have two guesses:

• Vacuum leak - Could be a vacuum hose that was inadvertently disconnected or broke during the AOS replacement.
• Dirty throttle body/intake - Check for oil residue fed into the intake from the AOS tubing.