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.

Base Cayman Shudder/Miss Fire

Thursday 06/30/2022 | 2008 | Cayman | Engine | 24 views

New to a 987.1 Cayman Base, I am noticing what feels like a miss below 2500 RPM when accelerating. No CEL though and this is reproducible hot and cold. It is most noticeable from a take off obviously but I also notice it when cruising sometimes. Is this just a by product of engine lugging or should I dive deeper into it?


steering is now hard to turn and making a squeaking noise turning right or left no fluid leaks reserivor cover off pumping brakes no bubbles

Thursday 06/30/2022 | 1986 | 944 Turbo | Wheels and Tires | 36 views

86 turbo steering started one day to be hard to turn. at speed not so bad but once you are pulling in etc at slow speeds the issue becomes harder to turn and the sound like its not power steering anymore. removed lid to fluid and started car turned left to right and no bubbles i could see.maybe the line is clogged? or pump not working at low speeds?filter in reservoir clogged perhaps? I read that you have to replace this as the reservoir is integrated into this unit ...


When the engine is running, there is a flute like noise eminating from the area behind the front passengers side wheel. It intermittently stops and then resumes with no rhyme or reason. It may be related to HVAC but Im not sure. How can I determine what it is and how to remediate the issue?

Wednesday 06/29/2022 | 2000 | Boxster S | Engine | 81 views

I have owned the car since last August and the noise is there summer and winter. The car is well kept and runs great with no other issues. The noise is monotone and it sounds like a flute playing or the noise that is made when blowing across the neck of a glass soda bottle. Radiators are clean and body fittings appear to be tight.


Back up camera aftermarket

Tuesday 06/28/2022 | 2014 | Boxster | Accessories | 9 views

Has anyone installed an aftermarket backup camera on a 2014 boxter. If so which would you recommend?


Should I put the convertible top in manual mode before removing the passenger side transmission? My suspicion is that the plastic gear is damaged, as there is a clicking sound when I try to put the top down. I don't want to damage anything else.

Monday 06/27/2022 | 2003 | Boxster | Cables and Controls | 9 views

I understand that realigning the control levers can be an issue for this type of repair. There doesn't appear to be an issue yet with the driver side transmission - yet, so I am only going to remove 1 transmission at a time.


Hazard Lights flash when driving car, doors unlock, interior lights come on

Thursday 06/23/2022 | 2002 | Boxster S | Electrical | 3 views

When vehicle is cold, after starting, hazard lights fast flash, doors unlock, and interior lights come on. The only way to stop it is to turn car off and remove key then restart. This will only work after car is warmed up.Also, at times part of the instrument cluster will flash. this comes and goes. I have replaced ignition switch, headlight switch, alternator, battery, battery cables. Immobilizer is new from ECUDoctors a few years ago. Checked all grounds.

Rear hatch glass is separating from window trim, any advise on a fix would be appreciated thanks .

Thursday 06/23/2022 | 1980 | 924 | Body | 3 views

2007 987 top cannot be unlocked.

Wednesday 06/22/2022 | 2007 | Boxster S | Cables and Controls

Replaced both push rods for the top due to the plastic ball broken on both and the left rod being parts adjusted to approx. length due to complete breakage ot the plastic head on both push rods. the top closed without any problem. The problem now is the top will not release the locking mechanism at the corners of the windshield.The windows don't go half way down when the center lock is released.It would be quite a coincidence if the micro switch chose to fail at this time,but could b ...


Noise that resembles tire hum at rear, It’s not tires.

Wednesday 06/22/2022 | 2011 | 911 Carrera GTS Cabriolet | Other | 15 views

I have a consistent hum that changes with speed. It is not associated with motor (RPM). I thought it was either tires or wheel bearing noise. Took the car to a factory porsche dealer and they did a check of bearings with stethoscope and nothing noted as a problem. They finally determining it must be tires as I had a set of Michelin tires on it that were not N rated. Just put a net set of Pirelli P Zeros N rated tires and still have the same noise. Not the tires. The noise starts at about 25 ...


Just about a year ago I purchased a 2006 Carrera S that has a mObridge Bluetooth unit installed, which replaced the cd changer to stream music through the Bose system. My car no says no cd changer when that input is selected on the PCM. The mObdridge unit is still powered up and functioning because my cell phone still sees it and is able to connect to it. Can the cd changer be reactivated by a coding unit (Foxwell for example) or does this require a trip to the dealer?

Wednesday 06/22/2022 | 2006 | 911 Carrera S | Electronics | 6 views

Photo of PCM software version attached.


I'm not sure this is a technical question, but I'm unsure where else to ask. Is it possible to find out if my car was previously owned by a PCA based on the VIN?

Tuesday 06/21/2022 | 2006 | 911 Carrera S | Other | 27 views

VIN: WP0AB29976S744400


Can the passenger door lock mechanism be removed through the small opening by simply moving the inner door metal trim panel? It is running afoul of the window regulator.

Tuesday 06/21/2022 | 2003 | Boxster | Cables and Controls | 6 views

Does the door handle need to be detached and removed to remove the lock mechanism? The window regulator, newly installed, is prohibiting the movement of the metal trim panel.


Can anyone suggest a good, solid Porsche shop in the Stuart/Jupiter Florida area. I have a 2002 Boxster in need of an IMS upgrade.

Monday 06/20/2022 | 2002 | Boxster | Engine | 6 views

Currently no symptoms. But I don't want it hanging over my head so I want to get it done and replace the clutch at the same time. I want to get the mechanicals out of the way prior to getting a new paint's original now and it's a 50/50 paint job. 50 feet and 50 MPH it looks great.


Hard shifting into first and reverse

Monday 06/20/2022 | 2006 | 911 Carrera 4 | Transmission/Clutch | 27 views

I am having trouble shifting into 1st and into reverse. it requires a little more elbow grease than it should. Also, during a spirited drive– I find that periodically in shifting from 1st to 2nd, that the clutch will take a moment to engage. It's like the clutch is slipping prior to engaging. The transmission fluid was changed at ~81K mile (<4K miles ago). I worry that this might mean my clutch is going bad. However, this problem just started-- can the clutch just all of a sudden fa ...


I just picked up a 2013 Boxster S — first Porsche! The factory option list included rear parking sensors, but not front sensors, and yet my front bumper has the sensors and they seems to be wired to something as far as I can tell. Is that just the way they came? Did my front bumper get replaced at some point (clean carfax)?

Sunday 06/19/2022 | 2013 | Boxster S | Body | 12 views

Any information or suggestions to minimize 'cowl shake' on Boxster convertible that happens at highways speeds between 73-76 mph? I understand that there is some frame flex with 'soft tops' in particular, which causes 'cowl shake' at speed, and was interested in hearing more about options that may help 'stiffen' frame.

Saturday 06/18/2022 | 2006 | Boxster S | Other | 9 views

Intermittent misfire

Friday 06/17/2022 | 2004 | 911 Targa | Engine | 6 views

My car is throwing a P305 intermittentlyI swapped out the coil pack and spark plug still get a MIL intermittently. It seems to happen only at low /idle RPM.Before I changed the coil pack it threw the code more frequently. Changing the plug made no di


Is it necessary to change the PDK filter?

Friday 06/17/2022 | 2016 | Cayman GTS | Transmission/Clutch | 6 views

The standard service interval for the PDK for 981 series is 180,000 miles or 12 years. I have seen recent recommendations that cut this to 60,000 miles or 6 years. I have a 981 GTS that I use primarily for track (DE) events. I'm not sure if the previous (original) owner performed any PDK service to date. I acquired this car with just under 20,000 miles. Since it's coming up on 6 years old, I plan to change the ATF and final drive fluids.Fluid (ATF and final drive oil) change ...


What is the best way to adjust the rear hatch?

Friday 06/17/2022 | 2007 | Cayman | Body | 3 views

With a rubber bumper midway down each side of the rear hatch, and two adjustable rubber bumpers at the rear, what is the best way to ensure the weight of the hatch is evenly distributed between the four bumpers and seals properly?


Weird Starter Issues 2004 Boxster S

Thursday 06/16/2022 | 2004 | Boxster S | Electrical | 9 views

This is an update to a previous question asked on this forum. My original starter was beginning to go, was making a loud squeal on start, or not starting quickly anymore. A few days before I installed a new starter, the current one would not stop spinning once the engine started. I had to turn off the car and restart then it would function properly. I purchased a Bosch rebuilt starter from Pelican. I installed it and the first few starter had no issue. Started faster than ever and no noise. S ...


Will a tach from a 991 replace a tach in a 997.2?

Wednesday 06/15/2022 | 2009 | 911 Carrera | Electrical | 9 views

my 997.2 has PDK. The gear indicator is not in the tach and to check what gear you are in requires taking your eyes off the road. L would like to replace my current tach if another will fit and the electrics are compatable.


Is it possible to identify which IMS bearing my 2005 911 was built with using the serial number?

Wednesday 06/15/2022 | 2005 | 911 Carrera Cabriolet | Engine | 15 views

P1219 P1578P1577 Codes help.

Tuesday 06/14/2022 | 2001 | Boxster S | Electrical | 324 views

Just bought this car with a clean PPI and it got a check engine light within my first mile of driving. Codes are P1219, P1578, and P1577. My code reader and others told me that means throttle potentiometer. So, I replaced it and the same codes came right back. It drives great, but I would really like to solve this issue. Anyone have any ideas?


Boxster revs

Monday 06/13/2022 | 1999 | Boxster | Engine | 270 views

It is suggested we not drive over 3000 rpm until warm, but not under 3000 rpm when warm. That's a critical rpm since that is about 2nd gear in the 5-speed if I remember correctly. It tends to get hotter, though not overheating, at that rpm for sustained periods in town.I have seen your suggestion (assuming Pedro is answering) we not run the engine at 3000 rpm if possible, due to bad harmonics at that rpm.Would trundling around town for short periods at 2500 or so in third be ok, ...


The rear hatch seems to be creating excess cabin pressure in the car. It's especially noticeable on bumpy roads. Does Porsche have a remedy for this?

Monday 06/13/2022 | 2007 | Cayman S | Other | 6 views

Upgrading to LED?

Saturday 06/11/2022 | 2006 | 911 Carrera | Electrical | 261 views

Looking to upgrade my 2006 911 Carerra Coupe (3.6) headlights, fog, and driving lights.  Any recommendations in terms of parts, brands, etc.. How to videos, etc.


Does the right wiper replacement have to be a curved one ?

Friday 06/10/2022 | 2002 | 911 Turbo | Other | 153 views



What is the best paint coating thickness gauge?

Friday 06/10/2022 | 2003 | Boxster | Body | 12 views

I am looking at a 2009 Boxster with 72K on the clock that has a flawless paint setup. The interior, however, is equally pristine. I just want to do my homework. Thanks.


I understand that there is a Technical Service Bulletin regarding Oil in the Cooling System

Thursday 06/09/2022 | 1990 | 944 S2 | Engine | 162 views

Is there a TSB regarding oil in the cooling system on 944 turbo and 944S2 engines?


The instrument panel lights will not turn off after ignition key is out .

Thursday 06/09/2022 | 2002 | 911 Carrera Cabriolet | Electrical | 78 views

The brake pad warning light in the dash will not turn off , even after I hade replaced all the pads and sesors.

Thursday 06/09/2022 | 2002 | 911 Carrera Cabriolet | Brakes | 102 views

The interior of my car is sand/beige. There are some scratches in the tan paint. Any idea as to what the paint code might be?

Thursday 06/09/2022 | 2007 | Cayman S | Paint | 174 views

The scratches are very minimal, located where a ring or fingernail might scratch the paint.


996 LED Headlight Bulbs

Tuesday 06/07/2022 | 1999 | 911 Carrera | Electrical | 162 views

I have a `99 996 with halogen headlights. I have found the stock headlights to be rather underwhelming in brightness and would like to upgrade before long summer road trips. I would like to retain the stock headlight lenses and turn signal indicators as they are original to the car and are in excellent shape. My inclination is to go with a LED bulb as I have done this on other cars. Does anyone have any recommendations on quality LED bulbs? Sometimes it can be difficult to find LED bulbs that ...


I put my 2013 Boxster storage about 10 months ago. When I went to get it out the trickle charger failed and the battery was “dead”.. My concern is the settings, what do I need to be concerned with regarding the operation of the vehicle?

Monday 06/06/2022 | 2013 | Boxster | Electrical | 270 views


Should I take my Porsche Master Mechanic's advice and turn the a/c compressor on every time I run the engine?

Monday 06/06/2022 | 2000 | Boxster | Heating and Ventilation | 423 views

I have recently undergone a wallet-ectomy with my local Porsche Master mechanic who has been my resource since 2004. The front pump in the transmission failed on Friday, May 14 2021 with just under 80K miles on the clock. Not a great time for me since my wife was terminally ill in the hospital. So, I sent the car to my local Porsche Master mechanic. After about a month, my mechanic removed the tranny and I took it to a trusted shop for a rebuild (actually only the front pump and a new ...


Just did the cable/bracket upgrade for my 987.2 Spyder. Question is how is the cable supposed to be routed through the new bracket which has a additional finger outboard of the transmission. Two choices would be outboard of the finger or between the finger and the body of the bracket (which wouldn't seem to change the cable angle much from the original set up)?

Monday 06/06/2022 | 2011 | Boxster Spyder | Cables and Controls | 90 views

Should I service Tiptronic transmisison

Saturday 06/04/2022 | 2007 | 911 Carrera S | Transmission/Clutch | 324 views

I purchased my 2007 C2S in 2021 with 136k miles on it. It is a California car in great shape and it has been serviced at a Porsche dealer up until 120k miles. However, there are no records of the Tiptronic transmission being serviced at the 12 year / 120,000 mile. Opinions seem to be split 50/50 whether the Tiptronic, which apparently is a MB sourced transmission, should be serviced at all. My local dealer recommended servicing it but a reputable local Indy shop advised against it because it ...


how to check for correct transmission fluid level when replacing the fluid-l

Saturday 06/04/2022 | 2008 | Boxster S | Transmission/Clutch | 105 views

I have seen 3 methods: fill until drip from fill hole; fill until 2-3 mm below fill hole ; and fill until 11 mm below fill hole.I don't want to over or underfill it -this is my first Boxster . It has the 3.4l engine and 6 speed transmission thank you


Why disconnect airbags if using a five-point harness? In the March 2022 Panorama Tech Q&A, Pedro Bonilla stated in his answer to the 2014 Boxster: Five-Point Harness question that "you should disengage the airbag when using a five-point harness". Why should we do this and miss out on the air bags safety features that are designed into our cars?

Friday 06/03/2022 | 2009 | 911 Carrera S | Interior/Upholstery | 225 views

I primarily track my 911 and have added a roll bar, racing seats and a six-point harness to both sides. I have never heard of disengaging the air bag system if a harness is installed.


Release parking brake message in multifunction display

Thursday 06/02/2022 | 2016 | Cayman GT4 | Brakes | 126 views

I had the rear rotors and pads replaced last week at a local shop with stock OEM Porsche parts. They gave the car back to me with warnings they could not clear. The red brake warning light is flashing, the electric parking brake warning light is on and the release parking brake message is displayed on the multifunction display. I took it to a well respected race shop today in my area and they could not fix it either. The car drives normally, no resistance from the parking brake noted ...


My Bose factory radio in my 2008 Porsche turbo cab is not allowing me to adjust the balance, fader etc . I have a Tookie installed.That never effected these controls.Any suggestions are appreciated.

Thursday 06/02/2022 | 2008 | 911 Turbo Cabriolet | Accessories | 129 views

I am a 43 year member of the PCA . I have owned 6 wonderful Porsches . I am having a issue with my 2008 Turbo Cab radio . I can adjust the channel knob on the left side of my dash display , and highlight the fader , balance and all the other radio adjustments. But I can’t populate the left screen with the horizontal lines of adjustments. It is the upgraded Bose audio system , all speakers are working ( just can’t adjust ) I had a Tookie installed to allow blue tooth for my cell phone use . Po ...


I realise this is sa ubjective question, but assuming I can buy the larger 16.9 gal fuel tank for my 2016 GT4, how many hours do you estimate to replace it?

Wednesday 06/01/2022 | 2016 | Cayman GT4 | Fuel System | 138 views

I instruct at Porsche, BMW, Audi, SCDA, etc. I bought car used and it came with the miniaml things I wanted, except it did not have the larger 16.9gal fuel tank. This means I have to make a trip down to local gas station. I'm interest4ed in getting an idea (WAG) of time it would take to do conversion. Perhaps its not just a direct swap but thought I would start with this question, so I can decide if worth the hassle, or not.Thanks, ...


What do you use for TDC when setting cam timing on RB then on left bank?

Wednesday 06/01/2022 | 1999 | 911 Carrera | Engine | 141 views

CD Player and Phone

Tuesday 05/31/2022 | 2006 | 911 Carrera S | Electronics | 183 views

there is a dash single CD player in addition to the trunk 6 CD changer. It has now eaten 2 CDs (ate the first one, then based on a recommendation online, slowly put another in to trigger the release of the first and ate that too). Would like to get that operational as well as some of the buttons fixed. There is also a car phone installed that I would like to get working. Is there a recommendation for an electronics resource to help with these?Thx, Lance ...


convertible top creases

Monday 05/30/2022 | 2008 | 911 Carrera | Other | 438 views

my convertible top has creases on both driver and passenger sides and a few round circle marks just on the passenger side only , also has a few abrasions, it opens and closes fine and I cannot find anything structurally wrong with the frame mechanism upon examining it


"Transmission Emergency Run" and "Transmission Temp Too High" errors?

Sunday 05/29/2022 | 2011 | Cayman | Transmission/Clutch

I have a 2011 Cayman base with PDK. It has 55k miles. During a short trip around town, the dash lit up with a "Transmission Emergency Run" (in red) message for ~15 seconds followed by "Transmission Temp Too High" (in white) for ~15 seconds. As I was looking for a place to pull over, both notifications went away and the car ran fine. The car continued running perfectly fine for about 1 month. Then, on another trip, the same notifications came up, but they jumped between emergency run and t ...


Should I use an ethanol protectant fuel additive in my 2007 997 turbo?

Saturday 05/28/2022 | 2007 | 911 Turbo | Fuel System | 216 views

engine turns over will not start

Friday 05/27/2022 | 1985 | 944 | Engine | 105 views

The car ran when I put it in the garage to start body work to prep for paint(about year ago). I went through the check for won't start in the Haynes repair manual. These seem to check out. Going further I have no spark at the plugs. I have voltage at the primary, but could not get a reading at the secondary I pop the little plug as the manual read. I tried a different coil still no spark.