My 2002 Boxster S suddenly quit running while I was driving it this week. No advance warning of anything out of the ordinary, it just quit. I pulled over to the side of the road, and tried to start it, The engine turns over, but the car will not start. I can hear the fuel pump pressuring up. Can you give me some ideas as to what areas to check? The nearest Porsche dealer is 130 miles from me, and I don't want to have to haul it all that way, for something that may be fairly simple to rectify. Thanks

car turns off while driving without warning - 1998-2002 ...

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iFixitwhat would cause my car to turn off while driving & what cause it to start with ... Before you do these, you may consider doing a quick check of your battery terminals. ... So changing out the ignition control module is not a one fix for life job. ... and all thesudden the check engine light would come on and the car would die.

Diagnosing Intermittent Stalling Issues - Underhood Service

www.underhoodservice.com/diagnosing-intermittent-stalling-issues/

Oct 1, 2008 - Replacing a perfectly good ISC motor or solenoid won't fix the ... If the engine stalls while idling or driving, the engine may be running ... The engine may startand idle fine, but run out of power or even stall at highway speeds. ... If the engine is running normally one minute, but suddenly quits, .... Then dies.

Engine Performance Problems Due to Crankshaft Position ...

This is a problem with Porsche cars. What you need is a trickle charger or use the car on a more regular basis to keep the battery charged. If you have a garage with power get yourself a trickle charger and leave the battery on charge when not using the car. If this is not posible charge the battery up fully start the car and see if your dash lights go out. If they don't go off it might be your alternator is not working, get it checked out, or do it yourself if you can.

Did you find out what the problem is? I am having the same issue

depend for the brake rotor sometime they can be lathe check for your brake rotor thickness

FUEL LIGHT FLASHING WARNING YOU THAT YOU NEED FUEL YOUR FUEL TANK JUST ABOUT EMPTY.

you have a transmission problem, you must have the Transmission Control Module (TCM) tested for the fault code that is set when this warnng comes on.

If the battery is VERY dead it may take quite a while jump start the car. You may have to run the car with the good battery for five or ten minutes to get enough charge in the old battery to start the car. Other wise a very dead battery will just "soak up" the electricity from the good battery. If your battery was old to begin with it may be unserviceable. I would take the battery out and take it to an auto parts store that can charge and test it. They will usually do this for free.

How long since a tune-up? Any applicable trouble codes? Two things off the top of my head, problem with ignition switch or intermittent rpm signal. I have no way to be sure?
When it stalls, does it quickly restart, if not, do some testing, see what your losing, fuel--spark--whatever.

have your cat tested (pressure test).