2020 BMW M2 — single-cylinder misfire comes and goes
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 appear…
Engine
Repairs & Ownership
2023 Mercedes-AMG C43 4MATIC — random misfire code but engine feels fine
Scanner showed a cylinder-specific misfire code after one rough start, but the car feels completely normal now. Plugs aren't that old. Would you swap coils to…
PixelHauler42Community StarterSep 2, 20262023 Mercedes-AMG C43 4MATICDMV / Maryland3 replies0 helpful
2023 Kia Telluride — ticking noise follows RPM but fades when warm
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…
CX-5 turbo oil level drops before service interval
I'm seeing the oil level fall enough between services that I now check it regularly. No obvious leak. For other turbo owners, what documentation/tests did you…
2024 Acura MDX — catalyst efficiency code but car drives normally
A catalyst efficiency code came back after clearing once. The car drives normally and there are no misfire codes.
2023 Subaru Outback — catalyst efficiency code but car drives normally
2023 Subaru Outback Wilderness, about 61,000 miles. A catalyst efficiency code came back after clearing once. The car drives normally and there are no misfire…
BoostCamper418Community StarterSep 1, 20262023 Subaru Outback WildernessWashington DC17 replies0 helpful
2021 Audi A6 — long crank only after filling the fuel tank
2021 Audi A6 Prestige, about 37,000 miles. The car starts normally most of the time, but after filling the tank it occasionally cranks longer and runs rough fo…
2022 Mercedes-Benz GLE 350 4MATIC — random misfire code but engine feels fine
Scanner showed a cylinder-specific misfire code after one rough start, but the car feels completely normal now. Plugs aren't that old. Would you swap coils to…
TrailTech93Community StarterAug 29, 20262022 Mercedes-Benz GLE 350 4MATICCentral Florida23 replies0 helpful
2023 Rivian R1T — single-cylinder misfire comes and goes
A cylinder-specific misfire code appeared after one rough start, then cleared and the engine feels normal. Plugs are not very old. Would you swap coils, inspec…
BoxerShopper534Community StarterAug 29, 20262023 Rivian R1T Quad-MotorPhiladelphia6 replies0 helpful
2024 Audi Q5 — ticking noise follows RPM but fades when warm
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…
2021 Mazda CX-5 — fuel trims are positive at idle and improve with RPM
2021 Mazda CX-5 Turbo, about 92,000 miles. Long-term fuel trims are much more positive at idle than at 2,500 RPM. No obvious misfire. Does that pattern still m…
1999 Toyota 4Runner — long crank only after filling the fuel tank
1999 Toyota 4Runner SR5, about 211,500 miles. The car starts normally most of the time, but after filling the tank it occasionally cranks longer and runs rough…
2024 Lexus RX — ticking noise follows RPM but fades when warm
2024 Lexus RX 350h, about 26,500 miles. There is a light ticking sound that follows engine speed for the first few minutes and then becomes hard to hear. Oil l…
2023 GMC Sierra 1500 — catalyst efficiency code but car drives normally
2023 GMC Sierra 1500 AT4, about 39,500 miles. A catalyst efficiency code came back after clearing once. The car drives normally and there are no misfire codes.…
2020 Kia Stinger — catalyst efficiency code but car drives normally — trying to narrow this down
A catalyst efficiency code came back after clearing once. The car drives normally and there are no misfire codes. Before condemning the catalytic converter, wh…
Anyone else: G37 runs hot at idle but cools once moving
Temperature creeps up sitting still and drops once road speed gives it airflow. Fans appear to run, but I haven't checked actual commanded speed. Any good way…
2022 Honda Accord 2.0T Sport — need advice: Small oil leak or just old residue?
2022 Honda Accord 2.0T Sport, about 22,000 miles. There is a damp area around the lower side of the engine but nothing reaches the ground overnight. I cleaned…
2021 Mercedes-Benz GLC — catalyst efficiency code but car drives normally
A catalyst efficiency code came back after clearing once. The car drives normally and there are no misfire codes. Before condemning the catalytic converter, wh…
2019 Porsche Macan — ticking noise follows RPM but fades when warm
2019 Porsche Macan S, about 86,500 miles. There is a light ticking sound that follows engine speed for the first few minutes and then becomes hard to hear.
2008 Honda Accord — long crank only after filling the fuel tank
2008 Honda Accord EX-L, about 111,500 miles. The car starts normally most of the time, but after filling the tank it occasionally cranks longer and runs rough…