991S PDK throttle hesitation from start
#1
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991S PDK throttle hesitation from start
Have a May'12 build 991S, PDK, S-Chrono, S-PASM, 11k km. Now that summer weather has arrived, and driving-like-I-stole-it whenever possible, a throttle hesitation issue has come up.
On fast acceleration from a stop, the initial few hundred RPM's from idle, there is a hesitation. This is in manual or auto, Normal, Sport or Sport Plus.
Smooth application of throttle from start, this does not happen, but only when I hit the throttle as to get into traffic quickly. I haven't tried hitting the kick down button in this way as generally getting into traffic entails a 90 degree turn and I'd initiate a spin.
I've tried a left foot on brake pedal and raising throttle to 1,500 rpm type launch but that is not practical.
What is your experience?
On fast acceleration from a stop, the initial few hundred RPM's from idle, there is a hesitation. This is in manual or auto, Normal, Sport or Sport Plus.
Smooth application of throttle from start, this does not happen, but only when I hit the throttle as to get into traffic quickly. I haven't tried hitting the kick down button in this way as generally getting into traffic entails a 90 degree turn and I'd initiate a spin.
I've tried a left foot on brake pedal and raising throttle to 1,500 rpm type launch but that is not practical.
What is your experience?
#2
Rennlist Member
Exact same for me (991-4S PDK). There is maybe a 1 second (?) lag when the accelerator is depressed aggressively from a stop when it feels like nothing is happening.
I just recently figured out that smooth application doesn't give you that lag but haven't played with it enough to figure out if I like that approach better.
I just recently figured out that smooth application doesn't give you that lag but haven't played with it enough to figure out if I like that approach better.
#4
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#5
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Made this video today to try to demonstrate the throttle response or acceleration hesitation issue.
#6
I have the same car and have not noticed it... although compared to my Cayenne diesel with all the low end torque, the 991S seems slow at low rpm. I chalked it up to being a low torque, high rpm engine. Maybe a software tweak can fix it for you. I couldn't really see it in your video, I guess because I can't see the tach or your accelerator pedal.
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#8
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I have the same car and have not noticed it... although compared to my Cayenne diesel with all the low end torque, the 991S seems slow at low rpm. I chalked it up to being a low torque, high rpm engine. Maybe a software tweak can fix it for you. I couldn't really see it in your video, I guess because I can't see the tach or your accelerator pedal.
Have an appointment July 18.
#9
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#12
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#13
you nailed it right.many po owners found that out the hard way when they pulled up to a vette at a traffic light
#14
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Join Date: Jul 2012
Location: Beverly Hills, CA
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I had the update performed last Friday and have noticed the same thing. Immediately upon acceleration, there is a slight hesitation before the vehicle actually gets going. I've noticed this in all modes.
#15
Drifting
I think 911 owners are well aware their car is NOT a drag racer (read American Muscle) and more of an overall package (handling in addition). Don Garlits I'm not looking to be... Emerson Fittipaldi maybe...