Porsche 991 C4S - cuts out at 70mph

[JP1966]

HI Folks:

Driving down the M11 last night at 70mph, as I started to coast I took my foot off the accelerator and the engine cut out - a bit like the "stop/start" effect (grrrr) rolling to traffic lights, only at speed...and the dash lit up with most if not all coloured warnings. I managed to roll across to the hard shoulder and as I came to stop I depressed the brake and the problem went away and I was able to continue my journey...Has anyone else experienced this or does anyone have an explanation please?

[trickywoo]

Check that the battery terminals are tight and clean as a first step.

After that I'd guess a diagnostic would be the next easiest thing.

[JP1966]

All tight and ship-shape ;-(

In for diagnostics on 20th, so hopefully it will show up then and I will report back for everyone's reference...

[Spare tyre]

Try driving with the fuel filler slightly open

[browngt3]

Your car is a prototype for the new EU mandatory speed limiters

[FrankCayman]

browngt3 said:

Your car is a prototype for the new EU mandatory speed limiters

[Desert Dragon]

When a car starts doing that if they can't find a fault time to chop it in. Awful experience. I'd have had kittens

[Pope]

Crank sensor or DME relay?


last reply was made at 959 - is it only me that sees that and smiles.......