What are the causes of unstable car idling?

1 Answers
MacEmily
07/30/25 9:40am
Here are the reasons that may cause unstable car idling: 1. Throttle valve, temperature sensor, idle motor, bent hydraulic push rod, poor sealing of upper exhaust oil seal, and carbon deposits in the combustion chamber can cause unstable engine idling. 2. Clogged fuel injectors with poor atomization, excessive clearance between cylinder wall and piston rings, spark plugs, high-voltage wire breakdown, and distributor short circuit can cause unstable engine idling. 3. Poor generator performance, clogged fuel filter, and insufficient fuel supply from the fuel pump can cause unstable engine idling. 4. Poor quality of the added fuel and engine oil can cause unstable engine idling.
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