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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.
Why am I losing power in 2nd gear at 3500 to 4000 rpms
Thursday 07/31/2025 | 1987 | 911 Carrera Cabriolet | Engine
In second gear between 3500 and 4000 rpms car loses power quickly and if I continue to try and push through it it sputters and feels like it would rather die than go further. In 3rd gear and above it just starts to ramp up when it gets into that range and can go well above with plenty of pull. Is this a MAF issue? When I got it, the car had an aftermarket supercharger installed on it for high altitude use in Colorado by PO, I live in Florida so guessing it just wasn't tuned right for my altit ...
READ ANSWERPassenger Side door wont open
Thursday 07/31/2025 | 2000 | Boxster S | Body
I have tried unlocking and locking with key fob, key in drivers door and on dash button. I have tried with window up and down. I have unhooked the battery numerous times. Window does retract when lifting exterior door handle. I did manage to get door panel off (hard to do when door is closed). I have access to lock / latch mechanism. Cable is connected and good. Mechanical connection from door handle is good. I am about out of ideas. ...
READ ANSWERAre there diagnostic procedures for the Rear Control Module?
Wednesday 07/30/2025 | 2006 | Cayman S | Electronics
I have some lighting units in the rear of the car (brake and reverse lights, CHMSL) that are not working, with a concomitant error on the dash to check the reversing lights.The lights check out as working (all of them, brake, turn, and reverse) and the fuse for the lights is good. I have also verified that the fuse holder in the driver's side fuse box is receiving power. The brake light switch has been cleaned and tests as good. The reverse switch on the transmission has bee ...
READ ANSWERAt what speed does the rear wing begin to create effective downforce on my 2016 GT4?
Tuesday 07/29/2025 | 2016 | Cayman GT4 | Body
How much downforce is created at different speeds by the rear wing of my 2016 GT4.
READ ANSWERIt appears that the illumination for the left side of my Cayman S instrument panel no longer works. Do you know what might cause this and what it will take to correct it?
Tuesday 07/29/2025 | 2014 | Cayman S | Electrical
I only notice it at night, and I don't drive the vehicle much at night, so I don't want to have the dash removed to correct this.
READ ANSWERmy VIN is not identifying my 1984 911.
Tuesday 07/29/2025 | 1984 | 911 Carrera Cabriolet | Other
VIN number is: WP0ZZZ91ZES151784my insurance company's too, have issues identifying this 911.
READ ANSWER2007 Boxster S with PSA Failure. PSA switch on console doesn't turn on. Replaced battery. Any suggestions??
Monday 07/28/2025 | 2007 | Boxster S | Electrical
READ ANSWERHas anyone here had experience with aftermarket lower control arms for the 986 Boxster? I’d love to hear what brands you’ve tried and how they’ve worked out for you. Any info on options across different price points would be super helpful. Thanks in advance!
Sunday 07/27/2025 | 2003 | Boxster | Suspension
READ ANSWERZero electrical power, FUSE?
Saturday 07/26/2025 | 2019 | Cayenne Turbo | Electrical
I mistakenly put a standard charger on my Cayenne Turbo for 2 hours not realizing that it had a Li-on battery bc I have the PDCC and rear steering. These vehicles have Li-on standard if you have those options. I was attempting to perform an Integrated Engineering (IE) ECU flash. I went out to check it and my charger was smoking. I quickly removed the alligator clamps and when I did the entire vehicles electrical system went black. zero power. My conclusion was the batteries BMS did its ...
READ ANSWERI’m looking for a recommendations for an independent Porsche 911 paint/body restoration for my 997.1 rear bumper cover damaged by the original owner. There is gravel damage on the painted surface and lower bottom edges of the cover. I would like to have this repaired or replaced with a new cover. I’m not sure if it would easier to paint a new primered cover or refinish the current cover. Please advise?
Friday 07/25/2025 | 2008 | 911 Carrera S Cabriolet | Body
I’m open to shops in North Phoenix and Scottsdale area.
READ ANSWERWheel fitment for 2001 Boxster S?
Friday 07/25/2025 | 2001 | Boxster S | Wheels and Tires
Will these wheels fit my 2001 Boxster S?Front: 965.362.126.00 8Jx17-ET52Rear: 965.362.128.00 9Jx17-ET55
READ ANSWEREngine oil viscosity
Friday 07/25/2025 | 2006 | 911 Carrera | Engine
I like to change my oil engine using mobil one . To insure that I ordered the right spec for my car’s annual service I went on the Porsche USA site , I was referredto Mobil’s site . Mobil recommended Mobil one full synthetic 5- 40 w. In the past I thought 0- 40 weight was what was required? . Has the specification changed ? Also, can you tell me what oil filter is the best recommendation? I usually get a OEM filter from my Porsche dealer, but I have been told that a Mahle was identical.
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Blew a tire on my 02 Boxster S, and had to drive 60 miles on a 23 year old donut (spare tire). I got the new tire and tried to replace the donut, but can't find a 105x95x17 tire. Any idea where to find one?
Thursday 07/24/2025 | 2002 | Boxster S | Wheels and Tires
READ ANSWERRear view mirrors reset
Thursday 07/24/2025 | 2014 | Cayman | Electronics
The rear view mirrors have a mind of their own. The reset to an unusable angle nearly every time after starting the car. Saving the preset positions doesn't help. A recent scan shows an 084D Inner Drivers Door Handle Switch. Any connection? Any suggestions?Thanks
READ ANSWERIs 15w-50 oil a safe alternative to 10w-50 Porsche classic oil?
Wednesday 07/23/2025 | 1994 | 968 Cabriolet | Engine
READ ANSWERCrankshaft stuck after timing chain guide replacement
Wednesday 07/23/2025 | 1998 | Boxster | Engine
New to this forum - thanks in advance for any help1998 Boxster I performed the chain guide replacement procedure following Jake R processes and I thought all went well. Finished with bank 1 today and buttoned every
READ ANSWERCenter vent air flow shuts off
Tuesday 07/22/2025 | 2005 | 911 Carrera Cabriolet | Heating and Ventilation
READ ANSWERI'm looking at buying a 2024 718 S. The car has 8943 miles on it but I was told that it has had an Over Rev Report. With the DME report added, should this be a concern and would it void any future warranty claim?
Tuesday 07/22/2025 | 2024 | 718 Boxster S | Engine
The DME report show; 2211_Overspeed range 1: Number of ignitions 79 Z211_Overspeed range 1: operating hours 371.98597 h Z212_Overspeed range 2: Number of ignitions 84 2212 Overspeed range 2: operating hours 371.98603 h 7213 Overspeed range 3: Number of ignitions 76 Z213_Overspeed range 3: operating hours 371.98600 h 7214_ Overspeed range 4: N
READ ANSWERShould I be using a fuel additive?
Sunday 07/20/2025 | 2012 | Cayman R | Fuel System
I use only non ethanol fuel both my 76 911 and my 2012 Cayman. I was told that the non ethanol "clear" fuel has NO additives in it at all. Should I be using any fuel additives and if so what do you recommend?
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