wont start cold?

[z281974]

First thing I would check is the ignition switch. Causes many electrical problems, often intermittently and is a known problem area. Next time you have the problem, try cycling the switch fully off and then back on to see if it will then start.

[distraught]

I have just had my car fixed (1999 Boxster) with a similar problem. Ask your mechanic / Porsche dealer to check the the Air Mass Meter is not faulty - it may sending incorrect readings to the cars management system (bare in mind I am not a mechanic!!)

Check that the Air Mass Meter is functioning properly!

[porschedude]

you can first clean the MAF sensor with MAF spray cleaner (buy at any auto part store). it may just be dirty. if that doesn't help, then see your mechanic. i doubt it is the ignition switch or you will have other issues like lights or radio not working correctly and you will have trouble pulling out the key from the ignition.