Carrera S "Lurching"
08-12-2011, 06:12 PM
#1
4th Gear
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Carrera S "Lurching"
I have a 2006 (fully stock) Porsche 911 Carrera S convertible, and have recently started to use it as a daily driver. I have had it since new, and the car has only a little over 9700 miles on it. Recently, the car has started to "lurch" forward when accelerating from a stop. It jumps forward about a foot and then starts to accelerate, and when it jumps, a loud bang (kind of more like a very loud popping sound), audible from the interior, comes from the rear. It feels like what happens when one lets up the clutch very fast (which is strange, since the car is an automatic). The first time it happened, I looked back to see if I was rear ended. It has happened twice, both times when the engine was warm. I have not touched the tiptronic since I got the car. Both times it happened, the car was being driven calmly, not accelerating or braking hard. Because of this, the car spent a lot of time in a high gear. Thank you in advance.
08-12-2011, 06:29 PM
#2
Sounds like for whatever reason the clutch is slow to grab- it spins a little an moves you forward and then bang it finally grabs. I'm not up on the PDK trans so someone who knows better can probably give more info. I'm not sure exactly how the clutch is actuated but in a traditional auto trans you'd be looking for a faulty solenoid or low fluid or fluid pressure. If i'm not mistaken you can wear out the clutch(es) if you do a lot of launches.. are you a launch guy? have you lost any fluid? is the car throwing any codes?
08-12-2011, 06:41 PM
#3
Rennlist Member
My throttle response seems "lurchy" at times but it think this is the result of not driving it hard enough. My suggestion? Take your CS for good spirited aggressive romp to re-map the throttle response. This has worked for me in the past. I am due. Now I could be full of s#%t so I am open for comments from our esteemed more experienced rennlisters... Comments? 
08-12-2011, 06:55 PM
#4
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Sounds like for whatever reason the clutch is slow to grab- it spins a little an moves you forward and then bang it finally grabs. I'm not up on the PDK trans so someone who knows better can probably give more info. I'm not sure exactly how the clutch is actuated but in a traditional auto trans you'd be looking for a faulty solenoid or low fluid or fluid pressure. If i'm not mistaken you can wear out the clutch(es) if you do a lot of launches.. are you a launch guy? have you lost any fluid? is the car throwing any codes?
08-12-2011, 07:24 PM
#6
Nordschleife Master
Sounds like for whatever reason the clutch is slow to grab- it spins a little an moves you forward and then bang it finally grabs. I'm not up on the PDK trans so someone who knows better can probably give more info. I'm not sure exactly how the clutch is actuated but in a traditional auto trans you'd be looking for a faulty solenoid or low fluid or fluid pressure. If i'm not mistaken you can wear out the clutch(es) if you do a lot of launches.. are you a launch guy? have you lost any fluid? is the car throwing any codes?
