cayenne s shuts down

[zgdanska]

hello.

My 05 cayenne s shuts down most of the time in a morning or on rainy days. I just change all plugs and all coils. It was fine for 5 days but it happen again. Usaly ones the car gets worm everything is fine. Any help?? thank you :renntech:

[mudman2]

you need fault codes

hello.

My 05 cayenne s shuts down most of the time in a morning or on rainy days. I just change all plugs and all coils. It was fine for 5 days but it happen again. Usaly ones the car gets worm everything is fine. Any help?? thank you :renntech:

[zgdanska]

you need fault codes

hello.

My 05 cayenne s shuts down most of the time in a morning or on rainy days. I just change all plugs and all coils. It was fine for 5 days but it happen again. Usaly ones the car gets worm everything is fine. Any help?? thank you :renntech:

we did connect to the computer but there is no fault codes at all . Only air bag fault light is on for a last week. :renntech:

[Loren]

The problem with intermittent problems is catching them in the act. If it left no pending codes that is unusually.

They likely need to connect the PIWIS tester and then "rain" water on the car with a hose.

[zgdanska]

i guess i will be stuck with that . It only happens when the engine is cold . If i press the gas pedal the car dies anyway or when i drive it , is the same thing.

[mudman2]

wow 997 fault detection hahaha

The problem with intermittent problems is catching them in the act. If it left no pending codes that is unusually.

They likely need to connect the PIWIS tester and then "rain" water on the car with a hose.

[zgdanska]

wow 997 fault detection hahaha

The problem with intermittent problems is catching them in the act. If it left no pending codes that is unusually.

They likely need to connect the PIWIS tester and then "rain" water on the car with a hose.

I just talk to my local service guy in Porsche dealer he told me that if we don't have any codes 95% chance that the high pressure fuel pump is bad . Any ideas ??

[zgdanska]

any manuals on how to replace the fuel pumps ?

[Loren]

That is a lot of work.

Perhaps you should measure the fuel pressure and output first. I doubt both fuel pumps could be bad unless their is some fuel contamination.

[zgdanska]

so , i need to remove the fuel tank ? or the rear seats ?

[Loren]

so , i need to remove the fuel tank ? or the rear seats ?

I was suggesting that you should measure the fuel pressure and output first - otherwise you are just guessing (IMHO).

[zgdanska]

did not change the pumps yet . Now when you start the car it runs only for about 10 to 20 seconds . When i am under the car i can hear the pump running (passenger side) , then the pump stops and 5 second after that the engine shots down. Any help before i send it to dealer ? :renntech:

[zgdanska]

just did the pumps . So far so good . Looks like the engine runs more stable.