Reasons for idling jitter of Chery Tiggo 5, and schematic diagram of idling adjustment method of Tiggo 5.

There are many reasons for the unstable idling and jitter of Chery Tiggo 5, especially when the cold car just started, which are generally caused by too much carbon deposition on the throttle. This needs cleaning and matching! Ignition system and oil circuit failure, valve train wear, EGR valve stuck, abnormal sensor signal, poor circuit contact, etc. It will cause unstable idle speed, so you'd better find a professional to check it. Illustration of idle speed adjustment method of Tiggo 5: Idle speed adjustment must be carried out under normal conditions, such as normal engine temperature, proper valve clearance, normal ignition system, good pipeline seal, fully open choke valve and tight throttle valve. When adjusting, first loosen the throttle opening adjustment screw to make the engine reach the lowest stable speed. Then screw in the idle speed adjusting screw with a screwdriver. When the engine is about to turn off, slowly loosen the idle speed adjusting screw to make the engine run smoothly and reach a high speed. Then, loosen the throttle opening adjustment screw to reduce the engine speed. Then adjust the idle adjustment screw to increase the engine speed. Repeat this process until the throttle opening is minimum and the engine runs at the lowest stable speed. Finally, increase the speed and suddenly close the throttle, so that the engine can still turn without stalling.