Idle & Combustion - Noises & Vibration Symptoms
Common symptoms and diagnostic guides.
Car feels uneven after several short stops
If your car feels uneven after several short stops, it may indicate issues with the engine such as worn spark plugs or a vacuum leak. Learn more about potential causes and solutions.
Car feels uneven after sitting in traffic
If your car feels uneven after sitting in traffic, it may be due to issues with the engine's ignition system or fuel delivery. Learn about potential causes and solutions.
Car feels uneven after store stop
A car that feels uneven or shaky after stopping (at a store or light) is typically showing a rough idle condition often caused by issues in ignition, fuel, or air intake systems.
Car vibrates stopping at lights
If your car vibrates when stopping at lights, it could indicate issues like worn spark plugs or vacuum leaks. Learn more about potential causes and solutions.
Car vibrates then smooth in town traffic
This symptom typically indicates rough idle due to engine or fuel system issues, engine mount wear, or ignition problems that smooth out once moving or load changes. Investigate fuel, ignition, and mount components.
Engine feels unstable on concrete
Engine instability or vibration when idling on concrete is typically due to rough idle caused by ignition, fuel, or intake issues leading to uneven combustion and engine vibration.