TorqueMech Symptoms
Rough Idle
A rough idle usually means the engine is struggling to maintain a smooth idle speed. This can be caused by air leaks, ignition issues, fuel delivery problems, or sensor faults.
Common Causes
- Vacuum leaks
- Dirty throttle body
- Worn spark plugs
- Bad ignition coil
- Dirty fuel injectors
- Mass airflow or idle control issues
Related OBD Codes
- P0505 — Idle Control System Malfunction
- P0171 — System Too Lean Bank 1
- P0300 — Random/Multiple Cylinder Misfire
- P0101 — Mass Air Flow Sensor Range/Performance
Common Repairs
- Repair vacuum leak
- Clean throttle body
- Replace spark plugs
- Replace ignition coil
- Clean fuel injectors
Related Repair Cost Guides
Spark Plug Replacement
Ignition
1.0 – 3.0 hrs
Ignition Coil Replacement
Ignition
0.5 – 1.5 hrs
Throttle Body Cleaning
Air Intake / Engine
0.5 – 1.2 hrs
Fuel Injector Cleaning
Fuel System
1.0 – 2.0 hrs
MAF Sensor Replacement
Air Intake / Engine
0.3 – 1.0 hrs
PCV Valve Replacement
Emissions / Engine
0.3 – 1.0 hrs
What Should You Do Next?
Not sure where to go next? Use these tools to continue diagnosing or estimate your repair.
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