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Kai Manuel

1999 996 Carrera, tapping sound, low oil pressure

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Hi everyone I have a 1999 996 Carrera cab, which today suddenly developed a tapping sound and engine light came on, idle speed dropped to 500rpm with almost no oil pressure at idle, limped home, help anyone, could a failed coil cause this? Mine look cracked and in pretty poor condition.

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How's the oil level? Did the oil pressure recover while you were driving home?

A failed coil should not cause oil warning light but sounds like you need a new set of coils anyway.

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Intermittent oil pressure warning light could be the oil pressure sender. Not too difficult to replace.

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Oil level is spot on, if I rev to 1000rpm oil pressure sits at 1.5bar, but tapping sound is my main concern, could tapping even at revs be failed coils or more sinister?

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Coil should not create tapping noise. It would help if you can upload a sound clip.

In the meantime, I would suggest changing out the pressure sender and replace all the coils (and spark plugs too while you are there). Then check the oil filter and drop the oil pan to check the oil pick up tube.

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Will do and I'll report back once I have replaced, coils, plugs and oil filter and drop pan to confirm oil feed is clear.

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Feel free to come back and post along the way. I don't know how I missed that. You mentioned the CEL was ON. Did you read the error codes?

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You will need a scanner. Could be a generic OBDII scanner (cheap wi-fi or bluetooth dongle) or Porsche specific ones such as Durametric.

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On 2/6/2019 at 11:46 PM, Kai Manuel said:

How do you read the error codes?

 

Take Ahsai's advice. Make a video of the car at idle from both banks of the engine under neither. 

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