i had a very similar issue in my 02 civic. i thought it was the current shunt, replaced it and it caused a bunch more issues, most likely got a bad part from autozone someone returned, lol. turned out to be an exhaust leak. the exhaust was leaking on long drives and would over heat the alienator and cause the voltage regulator diode bridge in the back of them to fail. most people dont realize that altinators now days have voltage regulators in th eback of them and are the main thing that fails when they go bad from overheating. mine was still kind of working and after i fixed the exhaust leak i found that if i increased the load on the electrical system enough, it would prevent any issues by running the fan on low and always keeping the lights on. wonder if this would fix the issue if it came back.
It's great that they worked with you!
i had a very similar issue in my 02 civic. i thought it was the current shunt, replaced it and it caused a bunch more issues, most likely got a bad part from autozone someone returned, lol. turned out to be an exhaust leak. the exhaust was leaking on long drives and would over heat the alienator and cause the voltage regulator diode bridge in the back of them to fail. most people dont realize that altinators now days have voltage regulators in th eback of them and are the main thing that fails when they go bad from overheating. mine was still kind of working and after i fixed the exhaust leak i found that if i increased the load on the electrical system enough, it would prevent any issues by running the fan on low and always keeping the lights on. wonder if this would fix the issue if it came back.
Will I have the same problem with my wrx sti 2019 ? ...with this AG-35-40-RS ?