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  • From
    Williamsburg, VA
  • Porsche Club
  • Present cars
    2004 Cayenne Turbo

LenO's Achievements


Member (1/1)



  1. I understand that there is a Technical Bulletin that addresses this problem. Do you know anything about it?
  2. Yes Loren. One of the NAV CD's has been in the drive when this noise occurs. I always keep the NAV CD for my region in the drive. I ejected the CD while the noise was occurring. The noise continued for a time after the CD was ejected. The tone of the noise seemed to change when the CD was ejected. It sounded a little louder.
  3. I've been getting a chattering noise from the PCM in my 04TT. It starts when I open the door to get in. It doesn't occur all of the time. It used to last just a few seconds. Now when it occurs, it may last a long time, continuing as I drive down the road, then suddenly stops. It sounds like the CD drive. I've ejected the NAV disc, and the noise continues but at a harsher level. Shutting off the PCM does not stop it. The NAV system operates normally. Has anybody else encountered this? Any ideas as to what is going on? OK, How do I change "nose" to "noise" in the Topic heading? (done - Loren)
  4. My 04 TT is still wearing the original 255/55R18 109V Conti 4x4 Contact All-Seasons at almost 18k with about 4/32" remaining. That's 2/32" off the wear bars so I have to make a change soon. I've scoured the web for info that may help to decide which tire to use as a replacement. The first choice is whether to stick with all-seasons or go to a summer tire. I was concerned when I went to the Porsche web site and found that the all season tires are no longer offered as an option for the 2005 Turbo with 18" wheels, although it is still available for the S and Cayenne. PCNA said that, because of the rated 180 mph top speed of the Turbo, they could not offer the V speed rated all season tires which are rated for up to 149 mph. That should not be an issue for those of us who can not cruise at sustained speeds in excess of 149 mph. The advantage of using a V rated tire instead of a Y rated is better ride and longer treadlife. Some people have used H rated tires and say they are getting better tread wear but they are sacrificing performance characteristics and the tire strength needed for a nearly 6000 lb vehicle. I have found that the all season tire has the advantage of better wet road traction, hydroplaning resistance, longer tread wear, and of course, better traction in light snow conditions. Some people complain about poor performance in deep snow but that is to be expected. An all season tire is by no means a snow tire. Many people have been deceived into thinking they should perform just as well and that is far from the truth. The summer tire has the advantage of better highway stability and better dry traction in cornering, but these advantages only manifest themselves at very high speeds and extreme maneuvers. For the kind of driving that most of us do (even us spirited drivers) the differences in handling will be negligable. The all season tire is supposed to be noisier but I have not found noise to be an issue at all with the Conti's. It seems that most of the advantages point to continuing with the all seasons. Even the 18k tread life, which I wasn't happy with when I started this thread, I now realize is pretty good for a high performance tire on a very heavy high performance car. As to which brand to choose, I have learned about the significance of the Porsche N-Specification assigned to some tires. N-Spec'd tires are the result of a joint engineering effort between the tire manufacturer and Porsche. The tires are designed and manufactured to Porsche standards to meet Porsche handling, safety and performance characteristics and that are specific to a particular car. PCNA said that, although a car owner can choose any replacement tire that they want, and there are a number of respectable choices, Porsche owners would be getting the best tire to match their car's performance by staying with the N-Specification tires. So it looks like I might stick with the Continental 4x4 Contact All-Season. They actually have treated me very well. The Pirelli Scorpion Zero is also a N-Spec'd all season tire, but reviews indicate that tread wear is not so good and it is somewhat noisy. That might be because of it's aggressive tread pattern. Tire Rack has a lot of reviews for the Conti 4x4 Contact and the overall rating shows up a not so good. When you use the filter to look at reviews from Cayenne and Tourag owners, which are the only reviews that are relevent, the overall results are very positive.
  5. I want to mount a concealed radar detector antenna behind the front grill of my 04TT. Now I can't figure out how to get into that area. Is there an easy way? Can the panel around the hood latch be removed? Does anybody know how I can get into that area?
  6. I ordered my 04TT with the Continental 255/55 R 18 4x4 Contact All-Seasons for the versatile tread design and the better ride characteristics of the taller sidewall. They run great. Smooth and quiet with no vibration at any speed and even wear at all 4 corners. My driving style is "spirited" but the tires have not been excessively abused. At 14k, I am down to a little less than 5/32. That's 3/32 from the wear bars or about 5k miles more. At 4/32, resistance to hydroplaning is greatly diminished for highway speeds so for safety sake, I should replace them at 15k. That's one set of tires per year. I see that Porsche now offers the Pirelli Scorpion Zero as an All-Season OE alternative for the Cayenne as well as the Continental 4x4 SportContact which is the Summer tire version. I'm happy with the Continental All-Seasons but I would like to get more miles between replacements. I'm not going off-road and I'm going to try to stay out of the snow so I could switch to the Conti Summer tire if there is an advantage. Does anybody have any info or comparison data on these 3 tires?
  7. Thanks for your reply Loren. I can see from the diagram that removal of the small panel (37) should allow the filter to drop straight down. My first challenge is to get to that panel. I want to remove the large trim panel from underneath the dash on that side. All I can see is one screw just behind the glove box door and some slots on the front side that hold it in place. Is that all there is or am I missing something?
  8. Does anybody know how to replace the Pollen filter for the 04TT? I think it should be under the passenger side of the dash, but I don't know how to get to it. Does anybody know of a good source of these filters as well as other Porsche parts at reasonable prices?
  9. I've been following Mudman2's advice in pursuit of my problem. Checked connections at the rear of the PCM and in the spoiler. Everything was good and clean. Went to the dealer and checked reception side by side with an 05TT and the noise on my system was significantly higher. He checked all connections again and replaced both diversity antenna modules in the spoiler. No improvement. On the 60 mile trip home I took a country road instead of main highway. I noticed that every time I went through a depression in the road the noise level on the radio pulsed up. I have been running with the PASM in the "COMFORT" setting. I switched to the "SPORT" setting and the noise increased and stayed solid. When I got home, I pulled the fuse on the PASM and checked for the AM radio noise in the "IGNITION ON" switch position. Noise gone. Now I know that the noise is probably the PASM pump. The questions are why and how, and how do I stop it. It seems like Porsche should have designed noise suppression into the system. Any ideas?
  10. Thanks Mudman2. I agree that electronics noise is somehow getting in where it shouldn't. I checked out your pictures at your Rennlist gallery. Good info. I was wondering how I could get the PCM out. My PCM is working 100% except for the AM noise. When you suggested one of the connectors could be off, are you talking about a ground connection? Looking at your photo of the back of the chassis, there isn't much there. Any connector that was totally out would cause some function to be missing. The antenna shields should be grounded through the antenna jacks. Is there a chassis ground connector or is it just grounded through the mounting screws? The power connector should have a negative side. Which one is the power connector? I have to find one of those hook tools before I can operate. Thanks for giving me something to work with.
  11. I thought I would get more specific about this radio problem I'm having in my 04TT. Maybe this added information will get a response from the electronics experts. 1. The problem only occurs during AM radio reception. 2. With the key in the "Initial position", the PCM comes on and AM reception is clear and strong. 3. When the key is moved to the "Ignition on" position (no engine start), there is white noise, or a loud hiss added to the AM reception. 4. The weaker the AM station, the more pronounced the noise. It is present even for the stronger stations, but not as prominent. 5. There is no problem in FM or CD modes. The noise is obviously being introduced by the vehicle electronics. There should be a noise fillter or supressor somewhere in the system to prevent this problem. Does anyone have any ideas?
  12. Thanks for your responses. Yes, I was considering an antenna amplifier. I am aware of the Antenna Specialist amps. I have an old FM version. A/S was absorbed by a larger company and no longer has the same product line. There are other brands available though. I am receiving AM broadcasts but the weaker station reception is no where near that of my wife's Lexus or any other car I have owned for that matter. The Porsche amp is probably working, just not very well, so I don't think it is just a fuse. It could be a defective amp but I have not yet been able to get the dealer to go that far yet. I have also noticed that the AM reception was just as bad in the S the dealer gave me as a loner. I was curious about the size and type of AM antenna in the spoiler. I was wondering if it could be augmented or modified to improve reception. If I did try the antenna amp, I was thinking of adding it at the spoiler end to boost the signal before it went into the Porsche amp. Any ideas are greatly appreciated.
  13. The radio reception in my 04TT is poor. The FM is disappointing and the AM is dismal. I've complained to my dealer with no results. Has anyone tried any antenna modifications or changes in the rear spoiler? Are there separate antennas and amps for FM and AM? How about adding an additional amp? How about increasing the size of the antennas or possibly just repositioning them in the spoiler? Is adding an external antenna to the top of the spoiler an option? I have to many questions and no answers. Any help would be greatly appreciated.
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