The warnings have stretched to the 60k mile mark already! Mark my words. By the time the retail for a 2009 reaches the price point for a 2005... say early last year, we'll see predictions out in the six figure range. Maybe then we can go back to talking about real problems, like how to pry me out of my car when I've having a glorious track day.

Gary, who will try to remember by
58k miles to negotiate a trade-in ...

 

If the the diagram is an accurate representaion of the timing of the injection, I would think that the it is possible to have the fuel keep some of the valve clean, but not the intake area. Is the fuel really injected when the valve is open? Then why the need for a high pressure pump?

 

All I was saying is that if you do a little research you will discover that some Cayenne Turbo owners are experiencing this problem with their DFI engines when they get to around 60k miles. IF that same problem becomes a pattern in Carrera's, that could be problematic, however, it's likely over-stated, as are IMS/RMS fears...Porsche engineers know what they're doing...
CATTMAN

 

Judging by your overreaction everytime someone raises this question or concern I would say YOU are the most worried person on this board. Tell yourself this: Should there prove to be an issue here it will not be the end of the world.

 

Thank you! Thank you! Thank you! Now I feel better, as I am really concerned about DFI.

Funny that when one asks for facts, one is labelled 'worried'. Reverse psychology at work, I say.

 

Fyi, there was a recent post (within the week) on Renn from a fellow whose .2 motor had developed a 'ping". He stated that running Techron thru the motor solved the problem (whatever it was). Point being it is ok to ask the question w/o receiving a (overly long) sarcastic reply. Actual communication is the prefered mode whether you like the ques. or not. I do not recall what the post heading was or I would direct you to it.

 

FYI... I saw that post, the poster subscribed with me on the issue. The poster concluded it was bad gas. No problem in asking questions. The problem is raising unfunded speculation.

 

The only person qualified to post on the exact nature of any problem/issue raised on this board is the technician who examines and successfully repairs the problem. For the rest of us, yourself included, it is all speculation. Feel free to speculate that the .2 motor will not exhibit the same characteristics that have been observed in other dfi motors. We will know for a fact only when a number of these engines accumulate significant milage and are torn down. Certainly the concerns are not "unfounded" in any sense. Hopefully they will prove to be non-issues but until such time there will be speculation. I will gladly come over and help you pull the heads off your motor at 25k miles.

 

I suggest you control your urge, as that milestone is not too far away, and I have no plans to tear the engine apart.

 

That seems a little restrictive. Engineers aren't entitled to a professional opinion on subjects like this? Only the technicians who work on the stuff we design?

Wow. That's harsh.

Gary

 

This is a huge problem in diesel engine cars from VW and others for many years, (they are all direct injection) to the point of having the entire intake manifold blocked off by crud. The problem is not the direct injection but the EGR system that allows spent gasses to cool and form deposits on the intake tract. My Mercedes diesel intake was almost completely occluded by this junk, it took 2 days of soaking and scrubbing to remove the crud.

The cure is to reroute the EGR, not an enviormental solution, but one that eliminates the problem. My diesel is completely clear after this solution.

 

WD 40 and a track day. Problemo solved.