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I took #3076 to my first PCA Drivers Ed event at ButtonWillow this weekend and experienced my first problem with the car. On the 2nd lap of my first run coming out of 13 onto pit straight, it blew a big cloud of blue smoke. I slowed and the smoking stopped, and both the instructor and I thought it was the oil seepage problem that's been mentioned on this forum before. I brought it back up to speed and there was no further smoking or any other apparent problem.
That is until I accelerated out of the buttonhook hairpin in 2nd. As the RPM just passed 6K, the engine cut out and coughed & spluttered until I dropped it below 6K. From then on, it wouldn't go above 6K without the same rough coughing & spluttering, but up to 6K, it pulls and sings like it always did. Engine temp was fine, just nudging about 175, though the track temp was about 110(!!). The oil level was one segment below full. No obvious fluid leeks, no engine check lights, just won't go about 6K. Discussions with the local wrenches suggested nothing and one even had an OBD diagnostic unit which we connected up and found no warning or error codes. I drove the rest of my runs keeping below 6K and even then was close to the fastest in my run-group and then back again to the Bay Area.
Has anyone experienced this? Any suggestions? Obviously, it's going into the dealer as soon as I can get it in.
BTW, I took a bunch of HD video in and out of the car and will post a short edit in the next few days.
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Sounds like the oil in the intake problem but I'd never heard of it causing an issue beyond a certain RPM range. Hopefully the dealer can spot the exact cause and then let us know what they found out.
John - probably Ken's de-snork... nah, just kidding. Was it only sputtering and not being able to go over 6k coming out of the turns? Or, was the 6k limit happening on the straights, too?... I'm sure you had the Sport Chrono in 'sport', but did you also have PSM turned off?
My theory - in coming out of sharp turns, I wonder if your PSM was kicking in not only braking the wheels, but in certain instances it wil also limit the revs or starve some cylinders of fuel to keep you 'on the road.' Even if you have it turned off, it will still engage in certain 'extreme' circumstances.
brad
Sport Chrono and Chrono Plus
This optional package is a valuable addition for trackday use. Available in conjunction with the CDR-24 CD radio, it includes a swivel-mounted analog and digital timer unit which is centrally located on the dashboard. All functions are easily accessible via the control stalk for the on-board computer. Analog dials measure hours, minutes and seconds, while a separate digital field displays whole seconds, tenths and one hundredths of a second. A second digital display runs in parallel in the instrument cluster. Click this Link to visit the FAQ entry for Sport Chrono.
PSM - Porsche Stability Management
While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility.
__________________
21-year PCA Member
PCA DE Instructor
Yeah, I was thinking it might be the de-snork, <g>, but no I'm sure the de-snork is what helped me get past the 993TT and a couple of C2Ses in my group so easily, even keeping it below 6K!!
As to the PSM, I tried both with it on and off, and with SC on and off, with no change. The cut-out happened going both going in a straight line and out of corners. In fact, I warmed it up in the driveway just now and it coughs and splutters over 6K, while sitting still!
Bit of a pain, hope I can get it sorted in time for the next GGTR AX.
PSM - Porsche Stability Management
While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility.
Yeah, I was thinking it might be the de-snork, <g>, but no I'm sure the de-snork is what helped me get past the 993TT and a couple of C2Ses in my group so easily, even keeping it below 6K!!
As to the PSM, I tried both with it on and off, and with SC on and off, with no change. The cut-out happened going both going in a straight line and out of corners. In fact, I warmed it up in the driveway just now and it coughs and splutters over 6K, while sitting still!
Bit of a pain, hope I can get it sorted in time for the next GGTR AX.
Your dealer will resolve quickly, I'm sure. It almost sounds like a cat problem to me.
Paul
PSM - Porsche Stability Management
While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility.
<hr style="width: 100%; height: 2px;" /> Bit of a pain, hope I can get it sorted in time for the next GGTR AX.
<hr style="width: 100%; height: 2px;" />I hope so, too. I'll be up for the AX on July 8 and hope to see you.
Some sort of electronic gremlin, it sounds like...
brad
__________________
21-year PCA Member
PCA DE Instructor
Have you been in rain since the de-snork? Porsche cautions that the deflector is there in part to protect the hot film mass air flow sensor. This sensor sends information to the computer about the amount of air geing ingested by the engine and its temp. as I understand it. If damaged it could be sending incorrect info.
Let me discount that speculation, I've taken apart the airbox and there is no way, even with the deflector plate removed, that enough water is going to get into the airbox, let alone up to the filter and past it to saturate the mass air flow sensor. What little water had made its way around the corner and into my airbox drained out of the drain hole in the bottom of the airbox before ever getting through the filter.
