Intermittently, when I turn the key to start the car, nothing happens for a second then the starter engages and the car starts and runs fine. Changed starter, coil packs and swapped relays for ignition also had charging system and battery tested all fine. It can go for days between incidents.
Unfortunately intermittent problems are difficult for anyone to diagnose. Only when it will not start can you try to test and diagnose the issue.
Had the same problem, it was a failing voltage regulator that is part of the alternator. Take it into an auto store like O’reilly’s and have them test your battery for free. Or if you have a multimeter handy, you can check your batter for any alternating current (which should only be DC from the alternator) and that is probably the same thing the O’reilly’s machine senses
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