YOUR RESEARCHWhirring sound for 1st minute or 2 at startup?
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Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
When I start my 99 C2 first thing in the morning, I often hear what sounds like a 'whirring'...sort of like a pump or motor cycling fluid through the system. It persists for about a minute, and then ceases. Never occurs again....until the next morning. Does anyone know what this is?
I have the same sound. I believe that it is an exhaust fan that clears fuel vapors from within the engine compartnment....but I too, would like confirmation of this sound.
Fuel vapors from the engine compartment?? I have heard of that on motorboats, but not on Porsches. There is a fan in the engine compartment, but it is for cooling and operates on a thermostat.
It is the secondary air pump that will come on for a minutes on cold start up. This is normal and necessary.
Good to know, I've heard the same system.
Thanks, always good to know things are working "normally".
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