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About ianproy

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  • Porsche Club
  • Present cars
    991.2 C2
  1. I'm not getting much help from Porsche on this apparent issue I've found, so I'm wondering if anyone has experienced the same thing or if my car is acting up. On the 991.2 C2, the manual transmission auto rev-match is supposed to rev match when downshifting in sport or sport + modes, but there are 2 separate behaviors of the system that seem odd to me: 1) Every auto blip falls short of the required RPM by about 50-100 rpm. This happens for almost every single downshift, no matter what gear i'm downshifting into. I know this is happening because the second I take my foot off the clutch, the car lurches a little because the blip is not perfectly matching what the RPM should be at that speed. It's a minor discrepancy, but I don't understand why the blip is not perfect. I owned an M4 before this, and that auto blip nailed the correct RPM every single time. 2) This is where the auto rev match really seems to fail, and it only happens when downshifting into 2nd gear from either 5th, 6th, or 7th gear. If I'm going at a speed (50mph) where the car needs 5000 RPM in 2nd gear, and downshift from 5th, 6th, or 7th gear to 2nd, the engine will only spin up to about 4500 RPM or less. It rarely ever spins up to nearly the correct RPM, and i'm forced to let the clutch slip to engage smoothly. Downshifting into 3rd gear or even 1st gear doesn't have this same issue (except for the constant miss of 100 rpm that I mentioned above). It really is only 2nd gear where the auto blip feature just completely misses the mark, making it all the stranger. Hoping someone has either experienced these same behaviors, meaning that Porsche's coding is poor, or that they have never had these issues, meaning that something is wrong with my car alone. Thanks!
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