What Causes Low Idle Speed in Cars?
1 Answers
Reasons for low idle speed in cars are as follows: 1. Spark plug carbon deposits: Carbon deposits can be cleaned to restore spark plug activity, but some spark plugs may be nearing the end of their lifespan, leading to reduced performance. 2. Clogged fuel injector or fuel line: Blockages in the fuel system, particularly in the fuel injector, can result in insufficient fuel supply pressure, poor fuel atomization, and an imbalanced air-fuel mixture, leading to incomplete combustion and related issues. 3. Faulty sensors: Malfunctioning sensors can prevent the ECU from accurately controlling the air-fuel ratio. Common examples include faulty coolant temperature sensors, oxygen sensors, and throttle position sensors.