Why does my Hyundai Tucson engine sputter at idle?

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Why does my Hyundai Tucson engine sputter at idle?

My Hyundai Tucson engine sometimes sputters o r shakes when it is idling, especially when the car is stationary o r stopped at traffic signals. What are the common causes of engine sputtering at idle in Tucson models used in Pakistan’s driving conditions?

Gari Specialist asked on 13 Jun 2025 18:11:07 pm

1 Answer

19 views |

Gari Master - on 13 Jun 2025 18:13:53 pm

Engine sputtering at idle can be caused by several factors:

Dirty o r faulty idle air control valve IACV: This valve controls engine idle speed and can get clogged by carbon deposits, leading to unstable idle.

Vacuum leaks: Cracked o r disconnected vacuum hoses can cause unmetered air to enter the engine, disrupting the air-fuel mixture.

Faulty spark plugs o r ignition coils: Worn o r fouled spark plugs and weak ignition coils can cause misfires, especially at low RPMs.

Fuel injector issues: Clogged o r leaking injectors can result in uneven fuel delivery at idle.

Dirty throttle body: Build-up of dirt can restrict airflow and cause rough idle.

Recommendation:
Have a mechanic inspect and clean the idle air control valve, check vacuum lines, replace spark plugs if needed, and clean the throttle body.