What causes unstable idle speed in the Venucia D60?
2 Answers
The reason for unstable idle speed in the Venucia D60 is: air from the intake system or fuel vapor with exhaust gas enters the intake pipe, causing the mixture to be too rich or too lean, leading to abnormal engine combustion. Excessive carbon buildup on the throttle valve and intake passages results in inaccurate idle air intake. Taking the 2020 Venucia D60 as an example, it belongs to the compact car category with body dimensions of: length 4756mm, width 1803mm, height 1487mm, and a wheelbase of 2700mm. The 2020 Venucia D60 is equipped with a 1.6L naturally aspirated engine, delivering a maximum horsepower of 126PS, maximum power of 93kW, maximum torque of 168Nm, and is paired with a 5-speed manual transmission.
I've driven the Venucia D60, and the unstable idle speed is quite annoying, especially during cold starts in the morning. The engine RPM jumps up and down, making the car shake. The most common cause is carbon buildup in the throttle body, which blocks airflow—cleaning it usually helps. Or it could be worn-out spark plugs causing uneven ignition. The fuel system might also be the issue, like clogged fuel injectors or a weak fuel pump, leading to uneven air-fuel mixture. I remember my car had this problem before; it improved after I replaced the air filter myself, but it kept recurring. If you're unsure, take it to a repair shop to scan for trouble codes. Prolonged unstable idle can increase fuel consumption and affect starting—don't wait until it becomes dangerous. Regular throttle maintenance is crucial; I recommend checking and cleaning it every 5,000 km—it saves money and hassle.
