I believe you may be able to see it with a durametric, but not sure how to otherwise..

 

Probably could be easily detected and recorded on a dynamometer This would most liked be a prerequisite to any lawsuit along with with the opinion of an expert

 

...and of course, those 8 vacuum tubes are all connected to our friend, the changeover valve.

These valves are now on their fourth revision (I am waiting for one back-ordered to arrive for my exhaust flap (non-PSE)).

Here's to hoping that the fourth time is the charm, and that the supplier got it right this time.

I for one hope that Porsche will do the right thing and issue another campaign to replace all 8 changeover valves, again, to put this rather annoying issue to bed once and for all.

 

SM_ATL got so fed up with their demented policy that he checked and replaced his himself. I think he found 3 defective valves!!

 

Ah, yes. But I think there is a new version out since. Part number now ending in an 'F'.

And at the moment they are unobtanium (none available at PCNA, back ordered from Germany, I am told).

 

A defective vacuum operated valve / leaking line could definitely cause issues. But the techs should be able to see if it's drawing the proper level of vacuum at various RPMs and throttle conditions.

ChuckJ

 

My techs have never gotten to the point where they are actually trying to diagnose anything by, you know, looking at the engine.

 

 

Are you going back for the stumble issue or something else? Please keep us advised. Thanks

 

"3. I've been told by a friend in Stuttgart who is a VP of Engineering with MBZ who has friends that are engineers at Porsche that almost every driveability issue that comes up these days are software/engine management update related. Not mechanical.

He also told me with some dismay that there are terrible losses in communication with service managers at dealerships. Mostly the frustration is on the German side with US dealership service techs not being educated or have enough experience with their own products. Maddening for owners who have driveability issues like this that should be simple to correct but that the procedure gets mis managed on our end."


There is a need to be fair to the local dealership/service guys, not just at P but, from what I see, BMW and others as well:

a) They generally (especially on new models) are not given the tools to diagnose many, many problems (especially software related problems). This is a real issue since as you point out the mechanical stuff is often not the problem; it lies in the code.

b) They have been trained to say that they don't see a problem or that the behavior is normal on any kind of new production, intermittent, or non-fault code thrown item.

c) They are heavily dis-incentivized (service reimbursement cost and future allocations) to replace anything that may come back "clean" when the parts depot checks it with their tools.

d) There are many, many known bugs/parts issues that are not "safety related" that are just not going to be fixed on existing models but some of which may be fixed on some basis as cut-ins to new production.

From what I can tell I do not have this issue but given my experience in cases like this with P and BMW I bow down to the thank the powers that be since I would probably just have to live with it. I feel your pain in getting this solved.

 

Sadly Stealthboy is not joking which makes this all the more disturbing.

With the right threshold settings you can just about hide anything.

This utter disregard for their customers, along with the perpetual hiding behind the lack of fault codes, will no doubt result in some very public unpleasantness.

Nick Murray's post buyback conspicuous silence was deafening, but that is a very risky strategy on their part.

 

Going back in for the hesitation/stumble issue. GA lemon law requires three strikes before a final demand to fix or lemon buy back.

 

And so it begins...

 

This is the reason I am so frustrated. Lemon law would be simple if we had a problem that was easily identified or there was a CEL. The problem, I fear, is that you waste your life taking the car into the dealership over and over again. Then you raise a lemon law suit, and you lose due to lack of evidence. Porsche will claim normal operation. I guess you could overcome some of this if you have a good service writer that believes you and is on your side. The language they put in your service records would be rather important.

I feel so stuck. My options are:

1.) I can't sell the car private party. Even if I were immoral enough to try and dupe someone into buying my flawed car, they would eventually come back to burn my house down after they realized I scammed them.
2.) I can trade the car to a dealer, but I'm going to get smoked. There is no way I'm going to roll the dice on another C2S, so it's a GT3 or Turbo. I don't want to own any other car. I figure the GT3 has a completely different engine, so the chance of having a similar problem is mitigated. It will be hard to get, but I learned today it can be done.
3.) I just live with it and resent my formerly perfect car.

I've been shopping GT3s today, so I may be taking the $20-$30K loss and moving on. Let's hope I don't jump out of the frying pan into the fire. The other problem is that I beat the daylights out of my wife the past few years with cars. She understands this one isn't my fault, but it's hard to broach the topic of losing $25K and spending a net $50,000 more right after buying an $80,000 M3. Sigh...

 

I have 14500 miles and I don't think I have it.