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drsmeal
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996 Wailing Sound
drsmeal replied to dbookman's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)
There is a phenomenon called cavitation which occurs when fluid depressurizes so fast it allows bubbles of air to form in the depressurizing fluid. It is an EXTREMELY destructive process if it is allowed to occur for long. An example, a large dam once had cavitation in its bypass channels, the one that allow runoff from the dam, and the phenomenon chewed over 10 foot wide and deep ruts into the concrete and raw stone. I would be suspicious of this in any pressurized system that wails in pain, especially when the pressure differential would be greatest, i.e. when the AC is dumping high pressure fluid into a not-yet-pressurized part of the system. Maybe this has nothing to do with your problem but, personally, I'd get it fixed if under warranty. -
Water pooling on drive
drsmeal replied to GaryD's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)
Mine does it too (2002 996). Just condensation, my old Vette did the same thing for years whenever I ran the A/C or the auto climate feature (runs the compressor). -
Engine hesitation/power 'blip'
drsmeal replied to GaryD's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)
This hiccup you describe is the change in Variocam settings. It annoys the hell out of me too but there's nothing you can do about it unfortunately, I've investigated it. Boxsters apparently did this as well around year 2000 but a 2003 I drove a few weeks ago was silky smooth from 0-6000RPM with no "kick in the pants". You'll notice this in 1st>2nd>3rd gears under light acceleration. It's noticible to new driver's too as my friend whose never driven a 911 before (poor schmuck) thought it was the turbo kicking in (non-turbo 996). Sorry man but I think unless you disabled the Variocam shifting through software or something radical like this I believe you're stuck, but rest assured there's nothing "wrong" with your car.