986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Heavy Engine Vibration at 900, 2k, 3k. Just replaced front moto + trans mounts. DMF?

dmboxster · 03-26-2019, 10:43 AM

Another follow up,

Checked the LTFT values today after some freeway driving. Looking at +15.6% and +14.7%. I either have a vacuum leak somewhere (intake boots?) or the MAF is done. Ordered a smoke machine off Amazon, I’ll update after the smoke test.

In other news, I test drove a 2012 Panamera yesterday. It actually shakes more at idle than my current situation. So maybe I’m in the clear on the vibrations. Another thing I noticed is that the vibrations are about 2-3x as bad with the A/C compressor engaged. Without it, it’s far less noticeable.

03-26-2019, 10:43 AM	#10
dmboxster Registered User Join Date: Nov 2014 Location: California Posts: 17	Another follow up, Checked the LTFT values today after some freeway driving. Looking at +15.6% and +14.7%. I either have a vacuum leak somewhere (intake boots?) or the MAF is done. Ordered a smoke machine off Amazon, I’ll update after the smoke test. In other news, I test drove a 2012 Panamera yesterday. It actually shakes more at idle than my current situation. So maybe I’m in the clear on the vibrations. Another thing I noticed is that the vibrations are about 2-3x as bad with the A/C compressor engaged. Without it, it’s far less noticeable. Last edited by dmboxster; 03-26-2019 at 10:47 AM.