I'm still battling an erratic running condition (low power at times, and stumbles/misfires under light throttle). Plugging in the generic tool yesterday gave voltage fluctuating readings between 12.4 and 13.2 (hot idle).
A mate suggested that it's reading a more regulated ECU supply voltage - not the actual charging voltage. Is this correct?
Car is at 100K miles now; wondering if the alternator is perhaps wearing (brushes) or diode breakdown occurring. No discernable noises.
Cheers for any suggestions!
Diagnostic Port Voltage, Xantia II
Moderator: RichardW