Why is my car engine shaking when idling?
Quote from AutoFixerMike on June 17, 2025, 2:47 pmLately, I noticed that my car engine vibrates noticeably when it's idling, especially when waiting at traffic lights. The shaking seems to get worse when the AC is on. The car drives fine otherwise, but the shaking at idle is really annoying. I'm not sure if it's something serious like engine mounts or just dirty fuel injectors. Has anyone faced this issue before? What should I check first to diagnose the problem?
Lately, I noticed that my car engine vibrates noticeably when it's idling, especially when waiting at traffic lights. The shaking seems to get worse when the AC is on. The car drives fine otherwise, but the shaking at idle is really annoying. I'm not sure if it's something serious like engine mounts or just dirty fuel injectors. Has anyone faced this issue before? What should I check first to diagnose the problem?
Quote from CheckEngineChamp on June 17, 2025, 2:48 pmIt could be several things, but most commonly engine shaking at idle is caused by bad motor mounts, dirty fuel injectors, or worn spark plugs. I had a similar issue with my Honda Civic, and replacing the spark plugs and cleaning the injectors fixed it. You might want to scan for any engine codes as well — sometimes a misfire code (like P0300) can point you in the right direction.
It could be several things, but most commonly engine shaking at idle is caused by bad motor mounts, dirty fuel injectors, or worn spark plugs. I had a similar issue with my Honda Civic, and replacing the spark plugs and cleaning the injectors fixed it. You might want to scan for any engine codes as well — sometimes a misfire code (like P0300) can point you in the right direction.