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Steve Tinker · 08-24-2013, 04:45 PM

stephen is correct - if the battery has stood for 2 years, its never going to recover and the Boxster electrical systems are very dependent on a good steady state voltage.

Replace the old battery (don't even bother trying to resurrect it or connect a good battery to it), switch on the ignition for 1 minute (without starting the engine), switch off ignition for 30 seconds and then start the car. This procedure lets the ECU adapt to its base settings.

If possible, hook up a scanner (Durametric if possible) and read the fault codes.

08-24-2013, 04:45 PM	#3
Steve Tinker Registered User Join Date: Dec 2008 Location: Queensland, Australia Posts: 1,522	stephen is correct - if the battery has stood for 2 years, its never going to recover and the Boxster electrical systems are very dependent on a good steady state voltage. Replace the old battery (don't even bother trying to resurrect it or connect a good battery to it), switch on the ignition for 1 minute (without starting the engine), switch off ignition for 30 seconds and then start the car. This procedure lets the ECU adapt to its base settings. If possible, hook up a scanner (Durametric if possible) and read the fault codes. __________________ 2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley. 2001 MV Agusta F4.