I own a 2015 Porsche Macan S with 38000 miles, and love almost everything about it. One thing that has crept up that bothers me perhaps more than it should, however, is a vibration at idle.
On cold start, the engine runs perfectly smoothly. In sport mode (higher idle RPM), it's fine as well. In all driving scenarios it's great. There are no codes stored. But, when the engine is fully warmed through (oil temperature >~200F) and especially when the cabin blower/AC are turned on, there's a moderate amount of vibration transferred to the cabin. There are two components to this vibration; one is a little less intrusive but constant, the other is rhythmic (probably twice per second) and can actually shake the vehicle a little bit (granted, I'm on tall sidewalls and base suspension, so this isn't hard to do).
On first demonstrating this to a local dealership's service department, I was quickly told it was normal. This seems rather unfortunate, as my Cayman, a proper sports car, doesn't exhibit anything close to this, even with its dynamic engine mounts in their stiff setting.
I took it to another dealership and the folks there weren't so sure about it being normal. They cleared debris from the blower, checked the A/C unit, performed a throttle adaptation, and performed a relearning of servo motor flaps (not sure what this is). This supposedly fixed the issue, but as is all too often the case it appears they didn't follow my directions and test with oil up to temperature... The vibration is unchanged.
Though I can't link to it directly as this is my first post, there was a post describing something similar posted back in 2015 under the title "Anyone else getting rough idle in extreme heat?"
All of this boils down to two questions: has anyone else experienced this, particularly as the miles accumulate, and what other diagnostic steps should I consider taking? Thanks!
EDIT - more information: spark plugs changed at 30k; I've tried Techron fuel system cleaner just for the **** of it which didn't seem to help much.
On cold start, the engine runs perfectly smoothly. In sport mode (higher idle RPM), it's fine as well. In all driving scenarios it's great. There are no codes stored. But, when the engine is fully warmed through (oil temperature >~200F) and especially when the cabin blower/AC are turned on, there's a moderate amount of vibration transferred to the cabin. There are two components to this vibration; one is a little less intrusive but constant, the other is rhythmic (probably twice per second) and can actually shake the vehicle a little bit (granted, I'm on tall sidewalls and base suspension, so this isn't hard to do).
On first demonstrating this to a local dealership's service department, I was quickly told it was normal. This seems rather unfortunate, as my Cayman, a proper sports car, doesn't exhibit anything close to this, even with its dynamic engine mounts in their stiff setting.
I took it to another dealership and the folks there weren't so sure about it being normal. They cleared debris from the blower, checked the A/C unit, performed a throttle adaptation, and performed a relearning of servo motor flaps (not sure what this is). This supposedly fixed the issue, but as is all too often the case it appears they didn't follow my directions and test with oil up to temperature... The vibration is unchanged.
Though I can't link to it directly as this is my first post, there was a post describing something similar posted back in 2015 under the title "Anyone else getting rough idle in extreme heat?"
All of this boils down to two questions: has anyone else experienced this, particularly as the miles accumulate, and what other diagnostic steps should I consider taking? Thanks!
EDIT - more information: spark plugs changed at 30k; I've tried Techron fuel system cleaner just for the **** of it which didn't seem to help much.
