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Misfire: Dealer said is common and no big deal

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Old 04-24-2023, 12:12 PM
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vodavoda
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Default Misfire: Dealer said is common and no big deal

2015 911.1 GT3. Sat during winter undriven for 3 months. Fired it up, and went on longer drive, no problems. A couple weeks later, fired it up. Start up sounded bad and the Engine Control Fault Permission to Drive dash warning came on. Went through the normal sequence of letting it sit, etc.,, fault did not clear and still had same unusual sound when started. Took it to dealer for the 2 year service and was told that it had misfire "which is common when a car sits for a while and no big deal. We cleared did the service which included the plugs, so you are good to go." Drives as it should now.

So, is this common? It has never happened before in my years of ownership and 12K miles of driving.
Old 04-24-2023, 06:37 PM
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Larry Cable
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Originally Posted by vodavoda
2015 911.1 GT3. Sat during winter undriven for 3 months. Fired it up, and went on longer drive, no problems. A couple weeks later, fired it up. Start up sounded bad and the Engine Control Fault Permission to Drive dash warning came on. Went through the normal sequence of letting it sit, etc.,, fault did not clear and still had same unusual sound when started. Took it to dealer for the 2 year service and was told that it had misfire "which is common when a car sits for a while and no big deal. We cleared did the service which included the plugs, so you are good to go." Drives as it should now.

So, is this common? It has never happened before in my years of ownership and 12K miles of driving.
news to me
Old 04-25-2023, 10:33 AM
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Cay_PI
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Maybe you got some humidity into the ingnition coils or something.. could be. If its not high-rev-missfire and doesn't come back, I wouldnt worry.
Old 04-25-2023, 11:48 AM
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TPG
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Drive it hard and find out
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Old 04-25-2023, 11:59 AM
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Palting
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I wouldn't say it is common. The plugs needing replacement are more likely the cause of the misfire.
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Old 04-25-2023, 01:25 PM
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dgoldenz
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I had this happen once and they swapped the plug from one side to another and it fixed it. This also seems to happen if the car is low on gas, dealer told me to never let the tank go below 1/4 full.
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Old 04-25-2023, 01:37 PM
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Check the oil/oil pan for fine metal flakes, which is indicative of the lifters eating themselves.
Old 04-25-2023, 07:08 PM
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No mention of the gas being low as a cause, but it was under 1/4 tank
Old 04-25-2023, 07:09 PM
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Originally Posted by Airbag997
Check the oil/oil pan for fine metal flakes, which is indicative of the lifters eating themselves.
Will do next oil change. Plan is to first drive, drive, drive, and then drive it some more.
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Palting (04-26-2023)




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