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ticking and groaning noise

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Dear everyone,

Hi, I am a newbie to this board. I understand that many people from this board are experienced Porsche technicians/owners and hope that you will have the answers to my questions. Actually I am encountering some problem with my 996tt and am wondering if you guys can help me to find out what was wrong with my car.


1. Ticking noise from the dashboard area (it seems that the noise will go away if I turn off the air con);

2. Groaning/Moaning noise from front of the car (I think the noise is from underneath my car);

3. When I start the car in the morning, everything seems fine at the begining. However, once I put the gear into D, the rpm of the engine will drop and the car wants to stall as if it does not have enough fuel.

I shall be grateful if you can let me have your views on the above. Thanks in advance.

Best regards.

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Ticking/groaning/whistling from dash that goes away when AC is turned off = low refrigerant, if your lucky just a top up but i'd expect that you have an aircon leak.

Groaning moaning is a possible front sway bar bush or link.

As for tt engine probs i'm afraid I'm clueless,

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  • 1 month later...

If you are getting a "ticking" sound when you turn off your AC it is a faulty servo motor. If the sound is more like a "whistle" then the expansion valve is faulty...the valve is located just in front of the pollen filter.

Moaning of the front suspension when steering is usually faulty upper strut bearings which have been updated. Lose sway bars links will cause a loud pop or click when hitting bumps...I have tighten the sway bar links during PDI's because they left the factory lose.

As for your rpm drop when selecting D when cold may be a torque transfer fault which is related to our great MAF sensors. More diagnosis with a PST2 Tester will be needed.

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