rumartin

Hi, Everyone. I am a first-time poster.

I purchased a 2010 997 C4S (manufactured in 6/2009) a month ago with only 1,700 miles on it. It was in perfect condition. I also had the dealership do CPO on it. Three weeks and only 400 miles later, the car suddenly took much longer to start than usual, and two minutes later I got a "Reduced Engine Power" message while driving. The car immediately went into limp mode. I had it towed to the dealership, and it was diagnosed as a high pressure fuel pump failure. The service manager did not seem too surprised and said it was the third one that they had replaced on 997s. He said they replaced many more on Cayennes. It runs fine now, but it certainly startled me, and I was definitely not happy with such a repair being necessitated on what is for all practical purposes a new car.

Any similar stories? If so, how is your car running now? Thanks!

Macster

With only 1700 miles on the car it is a *new* car. These cars come with a 4 year 50K mile warranty and in the case of problems time counts for nothing. Problems, if there are any problems, appear from the car being driven.

Heck I've had *new* car issues at 35K miles and 6 years after the car was sold new. Just thankful my 'new' (used) car has a CPO warranty!

Sincerely,

Macster.

Fahrer

This is a widespread problem with DFI engines of several brands of cars. I have a BMW 535 with DFI and BMW is having big problems with the fuel pumps and the injectors. As Porsches are sold in far fewer numbers it may take some time before it is seen as widespread, in my opinion. First, it is not catastrophic but rather a PITA. Secondly, you may be visiting the dealer several times to get the car fixed. The HPFPs are generally blamed but it could be the injectors or sensors or control modules. or....whatever. Since it has happened so early, I suspect the pump.

Edgy01

Curiously, in this month's Porsche Panorama their technical geek claimed in this month's issue that he's only seen one high pressure fuel pump failure. My local Porsche mechanic has seen plenty. They had a bunch of bad HPFPs in 09 and 10 when they went to the DI engines. Apparently, the operating pressure is critical to the running of the engine.

w00tPORSCHE

As an owner of an '09'er I've had no issues. I would have expected a bad initial set of HPFPs but to see it on a 2010 model year is not very encouraging. Wonder what extraneous factors if any (other than manufacturing defects) wear down these pumps.

Macster

I talked to some Porsche techs about this a while back when I was thinking about a new Cayman S with a DFI engine and was told the low pressure fuel pump can fail and make the HPFP look bad or even cause it to go bad if I guess it operates with too little fuel.

IOWs, the HPFP gets all the blame much like the previous models engines' RMS did when in many cases it was the IMS end plate with its crummy single o-ring and non-sealed bolts that was the source of the oil leak.

(I know the high pressure fuel pumps used by diesel vehicles are very durable but you got to feed then clean diesel with *no* water. These pumps do not like a fuel filter that restricts fuel flow too much or a water trap that is not drained often enough.

Sincerely,

Macster.

vexed

There are a few threads on this

https://rennlist.com/forums/997-foru...p-failure.html

https://rennlist.com/forums/997-foru...ne-issues.html

The HPFP in my 2009 C2S went out two months after I took delivery, it's a April 2009 build. One day to fix and no problems since. You'll be fine.

BoxsterG

I wouldnt worry about this too much. I had this issue on my 09 997. However, save your records for the future if it occurs again. Enjoy your new car and drive it regularly.

Pincomar

Relax. My 535i is on its 4th (or 5th?) fuel pump. Whatever issue Porsche may have is trivial compared to BMW's!

Mark.

91469972

Old news. Our BMW 335 had the problem and my 2009 Carrera S had it go out the first week. originally BMW stated that the manufacturer of the pump did not build per spec.

kyrocks

I have a January 2009 build C4S cab bought new, now 15,000 miles with no problems. This is a common topic and thread and I have been worried about it. Lucky so far, but who knows what will happen.

kosmo

same issue w/ my 09.

hlee1169

My fuel pump got replaced twice, first @ 3K, second @12K. The dealer told me due to parts shortage, I got a first generation pump @3K, so that's why it failed again around 10K miles later. Supposedly my current fuel pump is the second generation, so I hope it would last longer. Car has 18K now.

Minok

That is absolutely believable.

My old 1985 VW Jetta had a similar known issue. The fuel pre-pump, a small pump that sits in the fuel tank, feeds the main fuel pump that sits outside the tank under the car. The pre-pumps were known to have issues and when they fail, they starve the main fuel-pump of fuel, which then begins to overheat and eventually fails as well.

If any link in the fuel supply chain fails, it can cause failures or appear like a failure of a downstream part.

jimjoe997

My HPFP was replaced at 16,500 miles. The dealer told me it would have been about a $2000 repair if it had not been under warranty.