2009 Porsche Carrera S Exhaust Soot! - Page 4

CarGuy21 · 11-11-2009, 09:43 AM

Quote:

Originally Posted by mdrums

Yes the ABS is more sensative on the 09, especially at slow speeds and cold tires. The ABS is kinda of weird in this car but I will let you know how it works out with hot tires with better grip at the track next month.

Remember that brakes don't stop the car tires do. Your comments demonstrate that. When tires are cold they're not as sticky hence the early onset of ABS.

talkinghead · 11-11-2009, 09:44 AM

Quote:

Originally Posted by 19_hole

I too have this problem with my 2009 C2. My 2005 was an unbelievable car, in 40,000 miles it burned a total of 1 quart of oil. The 2009 is another story all together. It now has 14,500 miles and I have added almost 12 quarts of oil. PCNA is absolutly no help at all. After spending hours on the phone with them they go back to the stock "a quart of oil every 700 miles is normal". What a load of @#%$&!!!! I have owned and driver performance cars very hard all of my life and have never seen oil consumpsion like this.

I have also complained about the amount of soot on the exhaust. Again the PCNA answer is "that is normal for a DFI car".

Buying this car was a hugh mistake! I had had it to do over again I would have; 1) kepy my 2005, 2) bought a new V8 BMW M3, or 3) looked at a V8 Astin Martin.

This will definately be my last Porsche. Dealer is great but both PCNA and Porsche Germany couldn't care less about the car after it is sold. Will be selling or trading this car as soon as it makes financial sense and won't be back.

Porsche = EPIC Fail for customer satisfaction!!!!

19_hole, why sugar coat this issue!

You're averaging about 900 miles/qt. Have you noticed any change in oil consumption, or is it getting worse?

CarGuy21 · 11-11-2009, 09:52 AM

Quote:

Originally Posted by GNR996

Can't imagine what this may do to the long term life of the cats if thats the case.

My first impression, as others have already stated, is that these cars are running rich. With that being said, running rich will burn the cats out, not necessarily a bad thing as they become empty cans and backpressure is reduced. However, soot in and of itself will not necessarily hurt the cats as it is a particulate pollutant i.e. dust. As long as the engine keeps pumping it will push this stuff right out the pipes as some of you are seeing.

GSIRM3 · 11-11-2009, 10:10 AM

Quote:

Originally Posted by CarGuy21

My first impression, as others have already stated, is that these cars are running rich. With that being said, running rich will burn the cats out, not necessarily a bad thing as they become empty cans and backpressure is reduced.

Running rich burns the cats out and leaves them as empty cans? Very interesting analysis.

19_hole · 11-11-2009, 01:39 PM

It has remained pretty much constant. It is very frustrating to know that every 3 tanks of fuel you probably need a quart of oil. That would be something like a Fuel:Oil ratio of 180:1. Not exactly a 2 stroke but much worse than you would expect for a 4 stroke!

CarGuy21 · 11-11-2009, 03:28 PM

Quote:

Originally Posted by GSIRM3

Running rich burns the cats out and leaves them as empty cans? Very interesting analysis.

From personal experience on an '89 Ford T-bird Supercoupe.

GSIRM3 · 11-11-2009, 04:02 PM

Quote:

Originally Posted by CarGuy21

From personal experience on an '89 Ford T-bird Supercoupe.

You verified that the cats were in fact empty?

CarGuy21 · 11-11-2009, 04:19 PM

Quote:

Originally Posted by GSIRM3

You verified that the cats were in fact empty?

Yes, when I had them replaced at a local muffler shop. Personally witnessed be taken off and they were indeed empty.

rijowysock · 11-12-2009, 03:45 AM

i still love the car, just the soot is excessive... then again it rains here whenever i wash the car... so.. its dirty 24/7

savyboy · 11-12-2009, 11:11 AM

Quote:

Originally Posted by 19_hole

It has remained pretty much constant. It is very frustrating to know that every 3 tanks of fuel you probably need a quart of oil. That would be something like a Fuel:Oil ratio of 180:1. Not exactly a 2 stroke but much worse than you would expect for a 4 stroke!

Try to burn a couple tanks of gas through it driving with gusto. Floor it. A lot. Going uphill if possible.

Have you already done this? Some people drive their cars like they are scared of them. Not saying this is you because I have no way to know. But that driving style pretty much gurantees excessive oil consumption.

Quote:

Originally Posted by CarGuy21

Yes, when I had them replaced at a local muffler shop. Personally witnessed be taken off and they were indeed empty.

MJones · 11-12-2009, 02:05 PM

Soot is a fact of life with DFI engines, verified with PCNA field tech rep.
Two days of Carrera hard driving at PSDS really soots up the exhaust vs previous non DFI cars.
Oil consumption is up with DFI engines as well at PSDS.

No explanation given as to why this is.

Thats all I know...

964C4 · 11-12-2009, 03:56 PM

Quote:

Originally Posted by MJones

Soot is a fact of life with DFI engines, verified with PCNA field tech rep.
Two days of Carrera hard driving at PSDS really soots up the exhaust vs previous non DFI cars.
Oil consumption is up with DFI engines as well at PSDS.

No explanation given as to why this is.

Thats all I know...

So this is normal and nothing to be scared of ?

Bob Rouleau · 11-12-2009, 04:18 PM

Guys, I have nothing significant in the way of soot. I asked about the kind of gas. Many answered but there is no way to correlate brand of gas with excess soot from the answers.

Can we try again? If yes:

1) Guys without DFI engines, please stay out.
2) Confirm excess soot (or not) and type/brand of gas.
3) Confirm high oil consumption if you have excess soot.

It would be interesting to see if soot is related to the kind of gas i.e. perhaps ethanol or not.

Is there a connection between excess soot and high oil consumption?

FWIW, I have neither high oil consumption - 1/2 liter in 5000 miles nor soot. I use 94 octane with 10 percent ethanol and a double dose of techron (called tactrol up here) which is in the fuel. Dunno if that is a factor or not.

Best,

rijowysock · 11-12-2009, 05:11 PM

Quote:

Originally Posted by Bob Rouleau

Guys, I have nothing significant in the way of soot. I asked about the kind of gas. Many answered but there is no way to correlate brand of gas with excess soot from the answers.

Can we try again? If yes:

1) Guys without DFI engines, please stay out.
2) Confirm excess soot (or not) and type/brand of gas.
3) Confirm high oil consumption if you have excess soot.

It would be interesting to see if soot is related to the kind of gas i.e. perhaps ethanol or not.

Is there a connection between excess soot and high oil consumption?

FWIW, I have neither high oil consumption - 1/2 liter in 5000 miles nor soot. I use 94 octane with 10 percent ethanol and a double dose of techron (called tactrol up here) which is in the fuel. Dunno if that is a factor or not.

Best,

i think its the ethanol that they dont have overseas..... thats what i blame.

Bijan · 11-12-2009, 06:46 PM

I have used non ethanol V Power since new, soot inside and around tail pipe lips but none on car body or noticeable on startup

11-12-2009, 02:05 PM	#56
MJones Addict Rennlist Member Join Date: Apr 2002 Location: Los Angeles, CA Posts: 4,550	Soot is a fact of life with DFI engines, verified with PCNA field tech rep. Two days of Carrera hard driving at PSDS really soots up the exhaust vs previous non DFI cars. Oil consumption is up with DFI engines as well at PSDS. No explanation given as to why this is. Thats all I know... __________________ '10

11-12-2009, 04:18 PM	#58
Bob Rouleau Administrator Still plays with cars. Lifetime Rennlist Member Join Date: Jul 2001 Location: Montreal Posts: 9,012	Guys, I have nothing significant in the way of soot. I asked about the kind of gas. Many answered but there is no way to correlate brand of gas with excess soot from the answers. Can we try again? If yes: 1) Guys without DFI engines, please stay out. 2) Confirm excess soot (or not) and type/brand of gas. 3) Confirm high oil consumption if you have excess soot. It would be interesting to see if soot is related to the kind of gas i.e. perhaps ethanol or not. Is there a connection between excess soot and high oil consumption? FWIW, I have neither high oil consumption - 1/2 liter in 5000 miles nor soot. I use 94 octane with 10 percent ethanol and a double dose of techron (called tactrol up here) which is in the fuel. Dunno if that is a factor or not. Best, __________________ ..Bob Frozen North Rep & ceramic rotor roaster Hey, wait for me! racing.

11-12-2009, 06:46 PM	#60
Bijan Addict Rennlist Member Join Date: Jun 2004 Location: Sydney Australia Posts: 289	I have used non ethanol V Power since new, soot inside and around tail pipe lips but none on car body or noticeable on startup __________________ Bijan

11-11-2009, 01:39 PM	#50
19_hole User Join Date: Jan 2005 Location: Somewhere playing golf.... Posts: 125	It has remained pretty much constant. It is very frustrating to know that every 3 tanks of fuel you probably need a quart of oil. That would be something like a Fuel:Oil ratio of 180:1. Not exactly a 2 stroke but much worse than you would expect for a 4 stroke!

11-12-2009, 03:45 AM	#54
rijowysock Addict Rennlist Member Join Date: Apr 2009 Location: Palm Harbor Posts: 1,114	i still love the car, just the soot is excessive... then again it rains here whenever i wash the car... so.. its dirty 24/7