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Discussion summary
YOUR RESEARCH2004 996 C2 - Poor idle after short trip
Leading reported evidence
Run handful of minutes
Suggestion or failed attempt
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1
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Suggestion · Original poster
The engine would have been running for a handful of minutes.
Leading evidence: 'Run handful of minutes' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run handful of minutes' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
If the engine got wet by washing it or driving it in the rain, it would run poorly with misfires.
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Hi everyone,
I've had this a couple of times. It isn't repeatable. So I'll explain how it went down today.
I pulled the car from the garage and drove 1st/2nd gear gentle around the block (500m?) to park the car out the front of the house to wash it. The engine would have been running for a handful of minutes. Two? three tops. Water temp guage had not moved.
The car sat for around an hour as I gave it a quick bath. Front of the house is on an incline. So the car was pointing up the hill.
When I started the car it had a bit of a rough idle. It might of been around 600rpm? maybe 650? A couple of blips didn't help. Felt like it needed a little choke.
So I selected 1st gear and trundled down the road to put the car back in the garage. Once the engine had see 2k RPM it started idling just fine.
Engine is in excellent condition. 5,000k since a full refresh/build. In 3,500km it has consumed 100mL of oil, maybe 200mL tops. New MAF. New air filter. New sparkies
thanks
Unfortunately these cars don�t tolerate short, cold starts. The DME enriches the mixture during cold starts and the extra fuel tends to not burn completely. Shutting off a cold engine and then restarting starts this process all over again thus affecting your idle.
Next time run it to the store to pick up a refreshing beverage as a treat. Then wash it. You get a fun beverage and your Porsche doesn�t get loaded up with extra fuel in the engine and oil.
And it probably smoked like crazy too? Any time I take my car out of garage for washing, I take it for a 5 or 10 minute drive before and after. I do it to not experience what you described. First time it happened, I googled, and it was recommended to never just back it out....
IMHO, it could be cracked coil packs. I had the same problem on my 2nd 996. If the engine got wet by washing it or driving it in the rain, it would run poorly with misfires.
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