Rough Idle Cayenne V6 3.2 2005

[SwedePete]

I have a 2005 Cayenne V6 3.2 2005 with rough idle.

When cold it doesn't happen until the fast idle is down to normal, and then it starts to get rough.

And with just a little throttle it goes away.

 

Checked all possible vacuum cracks and leaks, found nothing.

Spark plugs and coils are new.

And so is the orange diaphragm in the crank overpressure system.

 

Any idea's?

[SwedePete]

On 5/9/2024 at 7:26 PM, SwedePete said:

I have a 2005 Cayenne V6 3.2 2005 with rough idle.

When cold it doesn't happen until the fast idle is down to normal, and then it starts to get rough.

And with just a little throttle it goes away.

 

Checked all possible vacuum cracks and leaks, found nothing.

Spark plugs and coils are new.

And so is the orange diaphragm in the crank overpressure system.

 

Any idea's?

 

Anyone?

[Loren]

Put a Porsche specific code reader on the car (like PIWIS or Durametric) and report the fault code(s) here.

[SwedePete]

Hi again,

And thank you for reply.

 

I have this Autel, and also the Porsche specific Icarsoft.

I get some code of less relevant systems like AC, park assist, instrument, etc

Only thing regarding engine is maybe this?;

PCM2 459

Gateway, only about low battery (I attached the charger later)

These don't go away when erasing.

[JFP in PA]

The scan tools you are trying to use have proven to not always be able to see the actual Porsche codes correctly, the only tools that do are the PIWIS system or the Durametric.

[SwedePete]

Ok thanks for reply,

I have nothing else so I have to look around here to see if someone have.

[SwedePete]

Also now have cleaned out the throttle body.

Maybe a little better....

But no cigar yet....

It smells a lot of gasoline when it studder.

The idle is always good a little while after startup.

Especially after cold start ( help by fast idle system)?

[SwedePete]

Something new for me to try out?

Could it be the cam-timing valve or the sensor?