2024 Rivian R1S Dual-Motor, about 14,500 miles. On road trips the car used to hold a higher charge rate longer. Now it starts tapering sooner even when the pack is warm. Could this be charger-side va…
The car gets lots of cold starts, idling and short trips with few long highway runs. The factory interval feels long for that use. How would you set an interval around duty cycle rather than just the…
There is early surface rust on brackets, fasteners and seams underneath, but nothing structural. For a salt-belt car, what treatment slows it down without creating a hard coating that traps moisture?
There is a light ticking sound that follows engine speed for the first few minutes and then becomes hard to hear. Oil level is correct. How would you separate normal injector noise from valvetrain no…
This started as a small annoyance and I finally decided to track it down. 2020 BMW M2 Competition, about 120,500 miles. A cylinder-specific misfire code appeared after one rough start, then cleared a…
