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Spitting fuel from exhaust

I had my sunroof seal replaced and I suspect the mechanic who did it either turned the ignition key on and off 200 times or just left the ignition on the whole time working on the car. More likely he turned it on and off many, many times causing the cold start valve to flood the engine. Because the engine was hydralocked with flooded fuel and so the starter would only give me a 1/10th of revolution each of the few times I gave it a try over 5 minutes. But after 10 minutes of waiting it actually did crank the starter continuously at a normal speed and the engine took at least 30 seconds of cranking (it's never taken that long before) before it started to hit and finally started. Then it was spitting unburned wet fuel from the exhaust while idling. Is that normal for a flood engine in idling recovery from flooded state?

The engine's now been run for a cumulative 1 hour of running over the last 24 hours and I'm still getting some spitting of fuel liquid out of the exhaust. Is it surprising that it's taking this long to clear up or could there have been some permanent damage done?

Is this series of events surprising from a technical point of view?

And then it was idling too high after it warmed up, and it's never done that before. Maybe I lost a vacuum line in the process? Maybe airbox leaking now coincidentally?


Last edited by octanemaestro; 12-05-2016 at 07:20 AM.. Reason: send notifications forgot, oh, too bad can't change that
Old 12-05-2016, 06:44 AM
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What year? Sounds like an earlier car that has the fuel pump come on when you turn the key to acc1. Try an Italian tune up?
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Old 12-05-2016, 07:20 AM
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well regardless id be changing that oil ... I bet tons of fuel has leaked by into case.
I am not 100% but I thought CSV only fired during " start" not on ignition on.

May depend on year though .
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Old 12-05-2016, 07:28 AM
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Originally Posted by 75 911s View Post
What year? Sounds like an earlier car that has the fuel pump come on when you turn the key to acc1. Try an Italian tune up?
1981 SC Euro

What's an Italian tune up?
Old 12-05-2016, 07:58 AM
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Italian Tune Up=Drive the piss outta it....
Old 12-05-2016, 08:05 AM
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Are you sure it's fuel?
Old 12-05-2016, 09:42 AM
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if the FP runs with the key on that is what happened,
CSV should only run when in the start position.

you could be running a tad on the rich side.

could be condensation coming out of the exhaust.
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Old 12-05-2016, 10:04 AM
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well regardless id be changing that oil ... I bet tons of fuel has leaked by into case.
I am not 100% but I thought CSV only fired during " start" not on ignition on.

May depend on year though .

A real cautionary note there.... On a VW, if the fuel pump goes bad and gas dilutes the oil, you're at danger of burning up your bearings. I suppose it's the same on a Porsche if the engine is hydrolocked. Smell the oil for gas contamination & take note of any increased volume...
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Old 12-05-2016, 11:01 AM
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A real cautionary note there.... On a VW, if the fuel pump goes bad and gas dilutes the oil, you're at danger of burning up your bearings. I suppose it's the same on a Porsche if the engine is hydrolocked. Smell the oil for gas contamination & take note of any increased volume...
Yep. Oil dilution can really screw up an engine. Stop running it and change the oil.

Old 12-05-2016, 12:55 PM
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