Vibration When Driving With AC On
07-25-2007, 12:04 PM
#1
8th Gear
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Vibration When Driving With AC On
I have a 2004 Boxster with about 23k miles. All scheduled maintenance done on time at Porsche dealerships. Of late, I have noticed that there is a vibration when I drive with my AC on. It usually happens when I am slowing down or coming to a stop and press the clutch to downshift gears or go into neutral. The vibration occurs momentarily and quickly disappears only to recur again. The vibration doesn't happen when I switch off the AC. Any ideas what it could be? Thanks in advance.
07-31-2007, 04:58 PM
#3
Race Director
Couple of things; Could be engine idle control not able to control...
Originally Posted by ranesh
I have a 2004 Boxster with about 23k miles. All scheduled maintenance done on time at Porsche dealerships. Of late, I have noticed that there is a vibration when I drive with my AC on. It usually happens when I am slowing down or coming to a stop and press the clutch to downshift gears or go into neutral. The vibration occurs momentarily and quickly disappears only to recur again. The vibration doesn't happen when I switch off the AC. Any ideas what it could be? Thanks in advance.
Another possibility would be one of the electric radiator fans has a cracked or missing blade and this out of balance condition causes some vibration that is more noticable at slow speeds.
Failing A/C compressor/accessory drive could be another possiblity. Or loose A/C compressor.
Assuming you can't reproduce the symptom with the AC not being on...
If symptoms present when A/C off, then... Well post again if you find this is the case.
Sincerely,
Macster.
