Whole Car Shakes at Idle
The vehicle vibrates or shakes when idling, which typically indicates an engine-related issue such as a misfire, vacuum leak, or worn engine mounts. The vibration is felt throughout the entire car.
Diagnosis Details
Possible Causes
Faulty spark plugs or ignition coils causing engine misfire at idle
Vacuum leak (e.g., cracked hose, intake manifold gasket) causing rough idle
Worn or broken engine mounts allowing excessive engine movement
Dirty or faulty idle air control valve or throttle body
Fuel system issue (e.g., clogged injector, bad fuel pump) causing uneven idle
Related OBD-II Codes
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What You Should Do
Check for diagnostic trouble codes (DTCs) using an OBD-II scanner.
Inspect spark plugs and ignition coils for wear or damage.
Listen for vacuum leaks (hissing sounds) and test with a smoke machine if needed.
Examine engine mounts for cracks or excessive movement.
Clean the throttle body and idle air control valve if accessible.
If the issue persists, consult a professional mechanic for further diagnosis.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
