2009 4S PDK - Stops abruptly in sport mode
#31
08-07-2009, 07:41 AM
In sport mode, just before coming to a stop the car abrupty stops or is jerky most of the time instead of the smooth stop in normal mode. The sport plus is even worse but I do not intend to use it in city driving. Is it the nature of the beast? Interesting if I have the sport mode in manual it does not stop abruptly.
What is the build date for your car?
#32
08-07-2009, 08:57 AM
That's what I thought too when I got my car, until someone pointed this out - then I noticed it. Really depends on how you come to a stop too - doesn't happen all the time.
My car was built in 12/08.
#33
08-07-2009, 05:35 PM
Just got my car last week - it was ordered by someone else who switched last minute to a cab - so I would guess my build date was in the last 30 days or so.
#36
08-11-2009, 01:11 PM
I suspect that in manual Sport/S+ it just stalls, opens the clutch (Neutral) as it stops. The 1st is engaged after stopping. It would be up to the driver (in manual) to engage a 1st.
In auto is different. As I speculated, if one is in auto on a tight hairpin, one might want the auto mode to engage a 1st. 'First' downshifts are always jerky even when done properly manually.
In auto is different. As I speculated, if one is in auto on a tight hairpin, one might want the auto mode to engage a 1st. 'First' downshifts are always jerky even when done properly manually.
OK, I'm about ready to decide that the car is behaving correctly in Sport. If driving fairly aggressively, the current behavior feels right.
And if not driving aggressively, that's what Normal is for. And if you "want your cake and eat it too", Manual should sort it out.
...My current thinking after doing some comparisons while out and about.
#37
08-11-2009, 08:53 PM
OK, I'm about ready to decide that the car is behaving correctly in Sport. If driving fairly aggressively, the current behavior feels right.
And if not driving aggressively, that's what Normal is for. And if you "want your cake and eat it too", Manual should sort it out.
...My current thinking after doing some comparisons while out and about.
And if not driving aggressively, that's what Normal is for. And if you "want your cake and eat it too", Manual should sort it out.
...My current thinking after doing some comparisons while out and about.
#39
08-13-2009, 06:27 PM
This is a deal-killer for me if the Panamera has this behavior...
Ferrari's F1 boxes were a little like this 5+ years ago. They've evolved over the years and the incremental improvements have resulted in perfection. The 430 Scuderia is absolutely flawless in operation -- shifts are seemless up or down in any condition. I suspect the Porsche engineers working on the PDK system just have to go through the same learning curve. What's impressive about the Scuderia is that it is not a dual-clutch system, but just a regular single clutch...
Ferrari's F1 boxes were a little like this 5+ years ago. They've evolved over the years and the incremental improvements have resulted in perfection. The 430 Scuderia is absolutely flawless in operation -- shifts are seemless up or down in any condition. I suspect the Porsche engineers working on the PDK system just have to go through the same learning curve. What's impressive about the Scuderia is that it is not a dual-clutch system, but just a regular single clutch...
#40
08-16-2009, 08:47 AM
This is a deal-killer for me if the Panamera has this behavior...
Ferrari's F1 boxes were a little like this 5+ years ago. They've evolved over the years and the incremental improvements have resulted in perfection. The 430 Scuderia is absolutely flawless in operation -- shifts are seemless up or down in any condition. I suspect the Porsche engineers working on the PDK system just have to go through the same learning curve. What's impressive about the Scuderia is that it is not a dual-clutch system, but just a regular single clutch...
Ferrari's F1 boxes were a little like this 5+ years ago. They've evolved over the years and the incremental improvements have resulted in perfection. The 430 Scuderia is absolutely flawless in operation -- shifts are seemless up or down in any condition. I suspect the Porsche engineers working on the PDK system just have to go through the same learning curve. What's impressive about the Scuderia is that it is not a dual-clutch system, but just a regular single clutch...
Please do not get me wrong as I am not a Porsche snob, I love all sport cars especially Ferrari but from my understanding, the F1 transmission in a Ferrari is no where near as duarable as Porsche's PDK. PDK as far as I know with my car requires no scheduled maintanance. I know Ferrari guys that go through F1 clutches in 7-10,000 miles. I have about 8000 miles and 6 track days on my PDK and no adjustment or service needed.
#41
10-10-2009, 12:49 AM
Does anyone notice this problem as well when accelerating (at low rev from gear 1 to 2)? My wife's c4s has this issue when slowing down, but also the same issue when accelerating as well - i.e., at low rev (from gear 1 to 2). The gear shift is a bit jerky and there is a "thumping" sound. I wonder if others have the same issue.
#42
10-10-2009, 01:20 AM
Does anyone notice this problem as well when accelerating (at low rev from gear 1 to 2)? My wife's c4s has this issue when slowing down, but also the same issue when accelerating as well - i.e., at low rev (from gear 1 to 2). The gear shift is a bit jerky and there is a "thumping" sound. I wonder if others have the same issue.
In other words if you or your wife has a heavy foot this will occur often.
BTW -- i do feel its a valid compaint that the downshift needs to face a correction . There is no way the Cayenne and Panamera owners are going to like this. I also feel that there has to be a better blend between normal and sport auto. Just as no one buys a Porsche to drive 30 MPH in 6th .. the jerk in sport auto as well as the car's inability to retain 7th gear at 55 in sport auto wedge the driver into facing the options of working around this .
#43
10-10-2009, 05:15 AM
My car has about 3600 miles and the only time I experience the 2-1 jerk was during hard stop with A/C on. I wouldn't call it violent thump/jerk but no more noticeable than my previous car, 06' E55. During gradual stop my car behave normally. However I did have my PASM/PDK module replaced in May and was told software update was performed for DME, PDK and PASM because the defective module wasn't communicating with DME.
John
John
#44
10-10-2009, 05:54 PM
Does anyone notice this problem as well when accelerating (at low rev from gear 1 to 2)? My wife's c4s has this issue when slowing down, but also the same issue when accelerating as well - i.e., at low rev (from gear 1 to 2). The gear shift is a bit jerky and there is a "thumping" sound. I wonder if others have the same issue.
#45
10-10-2009, 08:53 PM
Actually I do have the same complaint like most of you describe here. But I felt the symptom starts to ease. I think it might be beacuse the car broke-in. Right now the car has 1200 miles, and I hardly can notice the abrupt 2-1 downshift in auto sport mode. This is after I drove the car a bit more aggressively last trip for 300 miles day. Since then I also start to drive more spiritually with rpm between 3k and 4k most of time. Maybe if we drive the car harder as it is intened for, the "problem" would disappeared.