i just picked it up then started to drive down the motorway and i lost my power
then my porsche would not start
then after about 25 mins it started so drove a bit more and the same thing happened again
can someone help me with this fault

 

Could be a lot of things, but I would start by checking the DME temp sensor and the reference sensors. When the car died, and would not start again, was the tach bouncing at all when cranking. Look for that the next time it dies.

 

can you tell me were the reference sensors are
only just got the car not had a good look yet