Technical Q&A
Welcome to PCA's source of expert advice, where our PCA National Technical Committee experts answer your questions about all things technical.
Slight hesitation at 1900-2000 RPM no check engine lights
Sunday 03/29/2026 | 2003 | Boxster | Engine
I have a 2003 Boxster Base that has developed a slight hesitation around 1,900–2,000 RPM. It idles fine, drives normally, and accelerates as usual once it gets past that brief hesitation/shudder.I’ve continued driving the car, hoping a check engine light would come on, but so far there’s been no CEL. The hesitation also seems a little less noticeable now than when it first happened—I originally panicked, drove it home, and parked it right away.I’ ...
READ ANSWERCannot get driver side airbag light off
Saturday 03/28/2026 | 2002 | Boxster | Electrical
READ ANSWERAC blowing warm on passenger side
Friday 03/27/2026 | 2015 | Cayman GTS | Heating and Ventilation
My 981 Cayman GTS has been in storage for about 5 months over the winter. Got it out and AC is blowing warmer on passenger side than drivers side, not hot like heat though. It is slightly cooler when recirculating, both thermostats on LO. All servos appear to be working to select Floor, Face, Windshield and on those settings the drivers side is much cooler.Any idea what is going on and what should be done to fix it? ...
READ ANSWERWhat is the tire/rim config on a 2020 Macan S
Friday 03/27/2026 | 2020 | Macan S | Wheels and Tires
READ ANSWERWhy is coolant bubbling up from the small finger size depression in the expansion tank?
Thursday 03/26/2026 | 1980 | 924 | Engine
engine is not overheating. Coolant level seems to be ok. No leaks from cap or overflow or any hoses
READ ANSWERInstalling new front brakes on 911 997.1
Thursday 03/26/2026 | 2006 | 911 Carrera | Brakes
READ ANSWERWhat tire and wheel options are there for winter tires on a 2007 Targa 4S
Wednesday 03/25/2026 | 2007 | 911 Targa 4S | Wheels and Tires
Current wheels and tires are 19 x 11 rear with 305/30 19 tires, fronts are 19 x 8 with 235/35 19 tires.
READ ANSWER1970 911T Coupe - 4 speed man - while under load (accelerating) - car's 3rd and 4th gears are noisy. Trans fluid "topped-off."
Monday 03/23/2026 | 1970 | 911T | Transmission/Clutch
(I have a 4 speed) . While accelerating - during 3rd + 4th gears only - note : trans fluid is "topped-off" - transmission is noisy (a sort of high pitched whine - rough noise). Time for a transmission re-build? Car drives "OK." - no noise at 1st and 2nd gear. Thx. FDW
READ ANSWERheadliner repair for cayman 987
Friday 03/20/2026 | 2012 | Cayman R | Interior/Upholstery
The headliner in my 2012 Cayman R has come down and is obstructing the view in my rear view mirror. I need to have it fixed locally (I can take it up to 120 miles away if needed). Any recommendations near Merced, CA. Zip code is 95340.
READ ANSWERhow to open hood battery dead
Friday 03/20/2026 | 2005 | 911 Carrera | Cables and Controls
READ ANSWERTPMS Sensor
Friday 03/20/2026 | 2011 | Boxster | Wheels and Tires
Took the car to Discount Tire to change 4 TPMS sensors and alarm in the dashboard remains. Are there special TPMS for this year/model?Discount Tire cannot figure out, is this something else?
READ ANSWERany thing i need to know about putting studs on my 2015 cayman instesd of lug studs?
Thursday 03/19/2026 | 2015 | Cayman | Wheels and Tires
want to put studs on my stock 15 cayman wheels, instead of lug studs, this is for cometic reasons only . thanks paul 18 inch wheels
READ ANSWERDoor alignment issues
Wednesday 03/18/2026 | 1976 | 914 2.0 | Body
I have a '76 914 that had the typical hell hole issues. The longs were Swiss cheese in places, but the doors opened and close with zero issue. The car does not appear to have been in any accidents other than a a decent crease in the passenger door. I removed the doors and braced the openings prior to repairing the longs. Replaced the inner and outer longs separately to prevent sagging. I purchase another set of doors as the originals were beyond reasonable repair. My issue is when installing ...
READ ANSWERI’m looking at purchasing a 996 Turbo S. The PPI came back with worn out PCCB rotors. If I convert them to steel how will that effect resale in the future? Porsche dealership quoted me $67k to replace rotors and pads all the way around.
Tuesday 03/17/2026 | 2005 | 911 Turbo S | Brakes
READ ANSWERWhere can I find the software to get my 3.1 PCM from version 4.75 to 4.76. I was told PCA has a download version?
Monday 03/16/2026 | 2015 | Cayman | Electronics
just looking to update version from 4.75-4.76 which I believe was the last reiteration for PCM 3.1I just replaced the drive with a solid state version and thought I'd see if I could do this as well
READ ANSWERclock will not reset.
Saturday 03/14/2026 | 2008 | 911 Turbo Cabriolet | Electronics
I push the button to change the hour and I rotate the knob to change hour. I push to change to minutes and all works. I push the knob to set the time and it reverts back to the original wrong time. suggestions?
READ ANSWERI have owned my 1983 Porsche 944 since new. I have looked everywhere to determine a specific option code on my car but I can't find it on the internet. Would you know what is Option Code N69?
Saturday 03/14/2026 | 1983 | 944 | Other
I have owned my 1983 Porsche 944 since new. I have looked everywhere to determine a specific option code on my car but I can't find it on the internet. Would you know what is Option Code N69?
READ ANSWERCold start, second gear engagement
Friday 03/13/2026 | 2004 | Boxster | Transmission/Clutch
I have a 2004 986. Years ago, 2015- 2016 I replaced the engine and transmission with a 3.6, 6 speed from a 2002 996. Car has been fantastic and since then I have driven another 40,000 miles. Last year, I started having a problem engaging second gear when starting and driving off for the first time. Second gear will pop out, but after this failure to engage, will work perfectly the rest of the day. It is only on the initial cold startup that this happens. I have replaced the ...
READ ANSWERKoni strut installation issue
Thursday 03/12/2026 | 1973 | 914 2.0 | Suspension
I replace my very old Koni front strut inserts with new adjustable Koni inserts. All went well until I was tightening the top nut. When trying to get the required 59 lb/ft on it, the alignment tab on the washer sheared off. I replaced the washer and tried securing it with large channel-locks while torquing the nut to no avail. The same thing happened again. Yes, I lubed the bottom of the nut in both instances. ...
READ ANSWERHow where the rubber bushings originally installed at the factory on the 914?
Tuesday 03/10/2026 | 1973 | 914 2.0 | Suspension
I am not confident that my measurements taken prior to bushing removal are accurate. When I reinstall the bushings with liquid soap (the commonly recommended procedure), how much "working time" will I have to make corrections as I install the control arms to the chassis? Are there different solutions (glycerin, ??) that I can use that will increase it?
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