Two months ago, I bought a 2005 996 C4S. This is my first Porsche and I wonder if they have a peculiar way to start (especially in the morning).

First, when turning the key, it doesn't start immediately. You really have to keep the key turn for about 2-3 seconds.

Second, once it starts, it seems like it wants to turn itself off again. For about 4 seconds, it shakes, coughs, and farts ( during those two seconds, if I tap the throttle, it goes off ). After, it shakes and coughs, trying to clear its throat, then it accelerates to 1200 rpm's. and then it starts the warming up process. After it warms up, the engine is sweet.

Is this normal in a Porsche car ?? Or I need to take it to the doctor ??

 

Definitely not normal

 

yeah sounds like it needs a check up...when i start my c4s up it gives off that initial healthy fart and then its ready for business!

 

clean your throttle body thoroughly first.

might be that simple.

 

+1, it might be getting stuck

 

Hah...I just cleaned my throttle body and it resolved my poor idling at first-start symptom.
Funny thing is, the carbon buildup wasn't that bad, yet the cleaning made such a difference!

 

Sounds like two different problems to me. The key issue may be a fault in the ignition or security system not turning completely off, i.e. bad key, bad battery in key, ignition switch, etc... The engine firing may be a result of ignition cutout from the security system. My $.02.

 

not much of an expert on engines, but if you can explain how to clean the throttle body, it would be much appreciated!!!!

Thanks!

 

yea man get that checked out asap. let us know what happens

 

Easy! Take the air filter housing off and push the the T/B butterfly open with one hand and clean the mating surface with a cloth rag with a little gas or paint thinner. Clean the mating surface where the butterfly rest on and behind the B/F/Valve until clean. While you're at it, change your air filter too.

 

That would be the simplest DIY you've ever done.

Here's a "Idiot's Guide to Throttle Body Cleaning" with pictures.

 

AWESOME, Thanks everyone, gonna have to give this a go tomorrow.

 

also let it go through the diagnostics when you turn the key - wait and then start the engine.

 

I went to the link you provided and the description of the problem is exactly what I'm experiencing at start-up. That person describes the problem even better than me....

I will try the clean-up of the throttle body and I will post the results.

 

You're most Welcome! Hope it resolves your problem.

Oh btw, "that person" is yours truly...