Kazoo

[rizzo]

A new phenomenon has come to my 04 Cayenne S. 74K miles

On cold start up I hear what I will call a Kazoo sound at the moment just AFTER the engine ignites. And it immediately tapers once the engine is spinning. Less than one second.

This does not happen on subsequent starts after the engine is at operating temps.

Today, after sitting for about an hour (engine off), I jump in to fire it up to head off and the engine spits, sputters, and then dies.

It would not allow another attempted start until I removed the key completely.

I remove the key and try to start it again. It spits and sputters and then I tap the gas pedal a little bit and it finally ignites.

It has not done this since with three different shut downs and restarts today and the engine light has not come on for any of these events.

Anything I need to concern myself with base on others experiences? Something about to fail? Eject seats about to fire unexpectedly?

[wvicary]

The noise could be caused by the starter motor bendix but as it's stalling after starting the noise might be a vacuum leak caused from the PCV valve, they can fail internally and cause a squeal sound.

[SWFLHOMES]

Have you been successful in locating the cause of this? I have the same sound but haven't narrowed it down yet.

[mudman2]

So its not the fuel pumps going thru pre flight ?

Have you been successful in locating the cause of this? I have the same sound but haven't narrowed it down yet.

[rizzo]

I don't think so. I think the fuel pumps do their thing when the front door opens after sitting for a while. I will hear a hum or whatever that sound is for about a second when the door opens. I considered that normal.

This quite loud sound happens only on start up after the key has been turned to start the ignition sequence.

Hasn't happened in a while.

I know it's waiting to do this right after someone is admiring the car and I fire it up. Kind of like the hamsters in the AC unit making racket non-stop only when I have a passenger...

:angry:

So its not the fuel pumps going thru pre flight ?

Have you been successful in locating the cause of this? I have the same sound but haven't narrowed it down yet.

[SWFLHOMES]

Mudmann,

The "Kazoo" sound is dead on. It squeels then stops within seconds after start-up.

[wvicary]

It sure sounds like the starter, a common problem.

[rizzo]

Surely if it were the starter it would be making this sound all the time at start up?

For my car at least it has been intermittent. I don't know the location of the starter motor on the car but this just sounds like an air leak that seals itself almost at once.

Another $0.02

:huh:

It sure sounds like the starter, a common problem.

[wvicary]

The starter noise is intermittent and caused from a dry bendix bushing.

[SWFLHOMES]

Is there a way to service the bushing?

[mjg928]

I have a 2004 S with 44,000 miles and also getting the brief "kazoo" sound right after a COLD start up. Never happens on repeat "hot" starts. I've read all the starter theories but has anybody nailed this down yet? I'll be heading to the dealer to pick up some odds-and-ends later this week and will run it by the Svc Advisor. From the posts, clearly another common Cayenne "issue."

[nanaimoctt]

I have the same problem. Did anyone find out the problem yet? Now I've found my Intercooler pipes are full of OIL!!

[wvicary]

The problem is the starter, replace it or have it rebuilt, I have never seen this problem cause a no start situation just the noise. As to the oil in the intercoolers, it's normal to find some oil in them but how much is too much is another question. Are you constantly added oil and have no signs of an external leak?

[RFM]

It is probably the left inter cooler which contains the most oil, caused by the different positions of the turbo oil return lines left and right. The left side line runs hotter and becomes clogged with oil residues, i would clean the interior of the line first.