Help weird fault on my 997.1 C2 S

[derekboone]

hi all, happy Easter!
I Love my new to me 977.1 C2S, but a strange occurrence is haunting my enjoyment!
on three occasions I have accidentally hit the Rev limiter as I go up the gears from second to third- usually I push the clutch in a second to early!
i know- very amateur!
Each time, the engine will no longer idle.
it drives and pulls fine, but cuts out as you pull up, at traffic lights, a roundabout- or wherever. It always re starts, just will not idle.
when the engine is cold, the fault disappears. When you unplug the MAF, the fault disappears.
So the quick and easy thing to do is replace the MAF which I have now done three times! It cures the fault but Why does the car do this? I’m guessing it is an electrical fault? Will a re map cure this for good?
it feels like the cars tells me off each time I spank it!

 

[Timbo2]

hi all, happy Easter!
I Love my new to me 977.1 C2S, but a strange occurrence is haunting my enjoyment!
on three occasions I have accidentally hit the Rev limiter as I go up the gears from second to third- usually I push the clutch in a second to early!
i know- very amateur!
Each time, the engine will no longer idle.
it drives and pulls fine, but cuts out as you pull up, at traffic lights, a roundabout- or wherever. It always re starts, just will not idle.
when the engine is cold, the fault disappears. When you unplug the MAF, the fault disappears.
So the quick and easy thing to do is replace the MAF which I have now done three times! It cures the fault but Why does the car do this? I’m guessing it is an electrical fault? Will a re map cure this for good?
it feels like the cars tells me off each time I spank it!

Have you cleaned the throttle body? just wondering why you had to replace the Maff so many times, once is usually enough, are you replacing it with OEM part? I had a Boxster with exactly the same symptoms, when I changed the Maff all was cured, but I only had to do this once.

 

[derekboone]

Hi and thanks for your reply!
yes I cleaned the throttle body, it as thick with black gunk... so maybe the AOS is on its way out- no smoke on start up tho....yet!
the last owner had installed the carbon fibre 83mm air intake/throttle/plenum, (the ‘euro cup’?) where the MAF sits, I changed the MAF so many times because I noticed that the engine will idle when the MAF disconnectEd! Very odd, because the fault can’t actually be the MAF, what with them only being 3-4 weeks old!
i have changed the filters with dry foam cones, so they are new too.
its almost as if the ECU doesn’t like the MAF, once i have hit the Rev limiter!
really odd this one!

 

[ralphmusic]

Maybe the EuroCup part is causing an implausible event for the ECU at high revs and it is taking a short time to re-adjust. I am not sure this is a convincing causal suggestion but you might call Porscheshop on
+441215856088 . They supply the EuroCup kit and Iain their MD is the Technical Support on the Modified Register.

Ralph

 

[derekboone]

Ok thank you- I will give him a buzz during the week!
really appreciate your Response
D