What are the reasons for unstable idle speed during cold start of Tiggo 8?

1 Answers
McHarper
07/29/25 4:08pm
Tiggo 8 may experience unstable idle speed during cold start due to the following reasons: 1. Malfunctions in the fuel injection system, ignition system, or mechanical structure. 2. Issues such as air intake system leakage, low fuel pressure, clogged air filter, injector atomization leakage, improper idle adjustment, faulty spark plugs, or air flow meter failure. Methods to determine unstable idle speed: 1. Observe the engine's shaking intensity or check the fluctuation of the oil dipstick. A stable dipstick appears clear, while a shaking one may seem slightly blurred. 2. Monitor the engine's RPM. The tachometer will fluctuate if the idle is unstable. 3. Feel the vibration of the seat and steering wheel inside the car.
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