Would like to introduce myself, I live in Mexico City, been a long time Porsche owner. Currently own a MT 2011 997.2 TT NO sport chrono and as stock as they come. It's been presenting a recurrent power loss problem under diverse conditions (turbo boost is lost and problem is fixed by turning the car off then back on). The power loss problem is gone for days, then the problem presents its self again sometimes when the engine is cold, sometimes after a spirited highway drive. Local Porsche dealer has scanned the car 4 times and they say that no problem is showing in their scanned maps. The car has been tested by the dealer on 2 separate occasions, the first they drove it for about 300 miles and reported back to me saying they could not get the car to fail. The second time, just this week, they drove it for another 200 miles and they got the car to fail. They are saying its a loose clamp in one of the intercoolers. I'm no expert, but a loose clamp would generate a permanent problem and not one that presents itself under "unknown" conditions and that its fixed by turning the engine off and then back on. Can anyone please advise?? Anyone heard reported power loss problems like this??
Appreciate any comment, help, direction, opinion, etc. It's kind of a one man battle here in Mexico. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>

 

The clamp might be the problem if temperature is seriously fluctuating, but I'd say it's something with a bad boost controller or related sensor???

 

Thanks for the input. An electronic sensor somewhere sounds more likely since it has failed under any condition (cold engine, hot engine, etc.) and it resets the problem by turning the switch off and then back on, which I assume resets electronic sensors, therefore fixes the problem for a while.

 

Welcome lmartindelcampo!

We had a customer with a similar problem. His 997.2 TT engine sometimes lost boost for no reason. Eventually I disconnected the rubber hose between the turbocharger and the intercooler and it was full of oil, well at least half a cup of coffee. The intercooler was oily as well as the intake pipes and the throttle body. The oil also contaminated the sensors inside the intake system. New sensors and a new turbochargers were fitted and the problem was gone.
So you might want to check the rubber hoses for oil.

Good luck!
Stef

 

Thanks for the pointer Stef. Quick question, a problem like this would somehow show in one of the Porsche Scan's done so far??

 

I don't believe that sort of problem would show up in a diagnostic scan, unless it had oiled down one of the sensors enough to cause it to malfunction.

I don't believe it's too terribly hard to slide under there and pop one of the charge pipes off either the turbo outlet or the intercooler, you'll know right away if there's oil in it!

 

Not necessarily as the sensors weren't totally bad, they just were no longer accurate.
I remember that the problem was always temporary fixed by turning the engine off and on.

 

It sounds unlikely that a boost leak is the issue. I somehow don't see it re-sealing itself to present an intermittent fault. Sensors like boost controllers and/or air flow meters can present inetermittently. Sometimes cleaning them will solve the issue.

 

I've heard that another possibility for the off-again, on-again performance with the 997 TT is a loose connection at the fuel pressure regulator reference line. They can pop off...but that normally would cause a CEL. Just a guess - two cents worth!!!

 

Isnt it amazing how the world seems so small in places like this?
Someone from Mexico asking, Belgium answering, Houston, SL City, Overland Park-KS!

And the Greek shmuck saying his thing... awwww.... group hug everyone...


Seriously though, sometimes this amazing geographical coverage is worth noting... makes this place invaluable.

 

i have the same problem , and can't fix it till now , and the diagnostic readings was that there's a vaccum leak ....... my car is 997.2 pdk

 

This little tip actually came from another thread here on 6-speed. Finding it, however, has proven difficult. A persistent search will reveal the answer, I am sure. [ μηδέν χωρίς εργασία ]

I do like the global collaboration that happens on these forums. It's comforting somehow to know that cars are a pain in the butt all over the world!

EDIT: found the reference to the line to the FPR: https://www.6speedonline.com/forums/...ditions-2.html

FWIW

 

I have a 2010 TT with Sport Chrono, bought new from a dealer in California. After patiently waiting for the dealer recommended break-in mileage to accumulate I finally gave it WOT and was seriously disappointed to find that it was no more responsive than my C2S that I traded for the TT. The car emitted a "whooshing" sound at around 2500 rpm when the throttle was depressed about 3/4 of the way to the floor. I didn't think that was normal but then I had no experience with driving a turbo so I thought perhaps that was the normal sound emanating from the popoff valve.

But, I do have a 482 C.I. Kirkham Cobra that was materially faster than the TT, and I didn't think there should be such a significant difference. So, I took the car to the Porsche dealer in Kansas City. They looked at the car while replacing the center lock bolts, and found that one of the connections was loose on one of the intercoolers and tightened it. It made a world of difference and the car now runs like a rocket. Now, my problem wasn't intermittant like your problem seems to be. But, it nevertheless was a problem on a brand new car which proves anything can happen.

The dealer also replaced the steering wheel to fix the fogging problem with the plastic inserts.

I read about all three of these problems on this forum, and I probably wouldn't have known about the steering wheel or the intercooler problems if others on the forum had not raised them as issues! So thanks to all of you who have contributed to the forum!

 

From the news we here is the US it seems like Mexico city woudl be a scary place to drive a car that makes you stick out. I hope you figure it out. Drive her in good health.

 

Searching through the forums I came across this post. I just replaced my 07 tt with a 2012 tt pdk . Im also in mexico city. The car has extended warranty and 2,500 km on it its completely stock.

It had run flawless for the past 500 km but today I encountered the same sudden loss of power while driving. tried sport, sport plus and nothing... I then pulled on the side turned it off and on again and it worked perfect again.

I am going to take it to the dealer next week, but wanted to know if the mentioned issues in this threat which appear to be the exact same I have were actually found and resolved so I can point the service manager in the right direction instead of having them try tons of things and or not begin able to replicate the problem.

regards and thank you

diego garcia