Jump to content


The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)


Contributing Members
  • Content count

  • Donations

  • Joined

  • Last visited

  • Days Won


hahnmgh63 last won the day on August 9 2017

hahnmgh63 had the most liked content!

About hahnmgh63

  • Rank
    Contributing Member
  • Birthday 09/05/1963

Profile Information

  • Gender

Profile Fields

  • From
    Roy, WA
  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2006 Porsche Cayenne Turbo S
    2003 Audi RS6
    2001 Audi tt
    1974 Porsche 911 (RS clone)
  • Future cars
  • Former cars
  1. I just installed a Pioneer Avic 8200NEX in my '06CTTS. I got the B+ (constant power from the original harness), I got switched ACC power from the right side dash fuse box. I've found that the Cayenne fuse locations in the manual can be quite different depending on your options. It helps if you list your year and model of Cayenne which may narrow down the fuses and/or harness. I know there is a big difference in the head unit wiring between the PCM and the CDR23 so the wires behind the headunit will not be different. With the Pioneer, I get the reverse signal (backup camera) and gala speed signal from the High/Low can bus signals that went into the PCM. I used a Scosche adapter but it still needed a bit of wire tapping in. I also have the volume and channel change capability from the steering wheel controls.
  2. Has the transmission been serviced recently? As Loren said, could be wrong fluid, could also be the fluid level is too low. How many Kilometers on it? Possibly the valve body. A specialist should be able to troubleshoot the Torque converter and if it's locking up properly or intermittent.
  3. I changed mine last year after 30,000Km with about 130000km on the car and they looked cleaner that those. I do use the OEM Beru plugs.
  4. Call me anal but when I get home from a drive and park in the garage I almost always open the hood to let the engine cool better. With the hood closed things really bake in the engine compartment after coming to a stop. I do it on all of my cars.
  5. Try these guys, they ship around the world. https://www.kufatec.com/
  6. Keep it for at least another year to get some money out of your time and repairs. Also good to see after a year if the next Gen Cayenne has any problems although sometimes we know they don't show up for a couple of years.
  7. Codes cleared, you did a highspeed run down the A3 or A5 and all is well?????
  8. I've been to just below the headlights before and very slow. Definitely wouldn't recommend going any higher. My low tone horn failed soon thereafter but the high tone still works fine, that was about 2yrs ago.
  9. Congratulations on finally fixing that problem. A lot of work but you've fixed a lot of weak points which will contribute to long term reliability. I can't remember, do you have stock air filters? A more open filter can let some of the intake and/or Turbo whistling noise through.
  10. I may have been mistaken quoting the diagram number Lewis. Are you saying that Porsche has chosen to only to only sense off of one Turbo? On my Audi with ME7.1.1 both wastegate hoses go to a tee then onto the N75 and both Turbos have a sense line that tee's then goes onto the N75.
  11. Great discussions here, yes, a plugged or disconnected line should and will cause an quick overboost before the ECU shuts it down with a fault/limp mode. Keep in mind that lines (picture above) 10 and 5 (from each Turbo) go to a Tee before connecting to the N75 valve. So line 10 may be Ok but line 5 may be the problem. This is where my portable Snapon Bk6000 video scope saved me on my Audi.
  12. The N75 compares the ambient air to the compressed air from Turbine side (cold side) and adjusts boost accordingly. If you have a leak in the line going to the cold side from the N75 the sensed pressure will be lower than actual and the Turbos will try to overboost for a few seconds then the ECU will detect it, through the MAP sensor I think and will cause limp mode or just plain reduced boost. I had this happen on my Audi RS6 which also uses Motronic 7.1.1. Had just did an engine pull & replace, then had a custom tune and I started asking the guy for a tune with less boost. He gave me a custom tune or two with lower boost but said most other RS6's were using more boost than I asked for and weren't having a problem. I started thinking N75, used a spare to no avail, then used my Snapon video scope and started scoping the lines to the Turbos, they went from the N75 to a Tee then went to each Turbo, one was completely disconnected so the line was using ambient air or something in between due to one side being disconnected. Hooked up the line and all was well. While it was happening it pulled like a beast for a few seconds before limp mode kicked in.
  13. Very similar on the 955 to the 957. Scroll down and download his pdf. I installed mine under the plastic trim panel so you don't see the can but it does catch a fair amount of oil that would otherwise be coating the Intercooler, throttle body, intake manifold, and turbos.
  14. Oil isn't good but it is normal. Most of the oil comes from the PCV vent system and not from the Turbo seals. I found the delamination in my Y-pipe also a couple years ago and happened to find a new old stock IPD plenum to replace it. I don't think I would ever pay full price for the IPD product, it is better made and better flowing than the stock plastic pipe but not that much better. With that said, the stock plastic Y-pipe is pretty cheap to replace. Also, I installed two Oil catch cans in the PVC system to catch some of the oil going to the Intercoolers and intake, they do make a huge difference. Oil in the Intake air reduces Octane when mixed with the fuel, so in effect lowering performance by the ECU reducing timing and/or boost.

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.