Intermittent issue - Seen this?

[Clewsey]

Good afternoon all

Anyone of you GenII owners seen this irritating problem? I'm assuming it's linked to GENII but could be wrong.

Intermittently, I start the car either from a cold or warm start. It fires up and after a second, the revs instantly die and the engine cuts out. 5 secs then I retry with the same results until the brake pedal becomes solid and the car no longer turns at all.

The fix (and it works every time) I get out the car - lock it - wait 30 seconds - unlock - restart and it starts first time and runs fine.

If some of you recall last year, I thought this was initially down to very extreme low temperature/low fuel when it first happened but I'm now 110% convinced it's not mechanical or linked to fuel levels at all. This problem doesn't happen very often, but there's no pattern other than I know the solution works. I've only experienced this issue since having the car serviced last year.

My gut feel is it could be linked to software bug, immobiliser/key perhaps given the way nature of the perceived fix.

Any thoughts?
Cheers,
Simon

 

[garyw]

ORIGINAL: Clewsey
My gut feel is it could be linked to software bug, immobiliser/key perhaps given the way nature of the perceived fix.

Any thoughts?
Cheers,
Simon

I think you're probably in the right direction...
Dealer visit really....

garyw

 

[Clewsey]

Yep, I'm going to book it. Unless this is a known problem I can see it being hard for the OPC to reproduce (these kind of issues don't repeat themselves when you want them to). Unless of course, there's an error being recorded for this.

Simon

 

[yan]

Gawd!

I hope things are recorded but in my experience you are at the mercy of a fairly limited diagnostic system.

I note you mention locking the car and waiting 30secs is a solution. Have you got the Sport Chrono option? In which case have you set the autolock individual key memory option to anything other than off? There are some non-advertised but known to Porsche issues with bugs (they call them features) in this area - across all the ranges if I am not mistaken.

 

[Clewsey]

HI,

Yes, got Sports Chrono. Daft question - Where are these options presented? I can't recall seeing them before, maybe looking in the wrong place []

Do you think there could be any connection?

Cheers,
Simon

 

[Clewsey]

ORIGINAL: J

Gawd!

I hope things are recorded but in my experience you are at the mercy of a fairly limited diagnostic system.

I note you mention locking the car and waiting 30secs is a solution.  Have you got the Sport Chrono option?  In which case have you set the autolock individual key memory option to anything other than off?  There are some non-advertised but known to Porsche issues with bugs (they call them features) in this area - across all the ranges if I am not mistaken.

Ok - had a look and found the settings. It was set to drive off locking ( I recall doing this now). The odd thing I found is the map was non-3D, and the trip info was kms, not miles. I think my PCM system has crashed/reset itself at some point []

Anyhow, I'm going to swap to the other key and see if the problem still occurs.

 

[yan]

If the other key doesn't help see if switching auto-lock to OFF makes any difference.
Reflecting on your situation it sounds a particularly undesirable feature so I hope it's something more repeatable than the sort of bug I have tripped over which causes random beeps every now and then, suggesting an alarm/locking fault yet on investigation the computer says no...