What Causes Idle Vibration in the Buick Excelle?

1 Answers
Dante
07/25/25 10:07am
Idle vibration in the Excelle is generally caused by a dirty throttle body or excessive carbon buildup in the fuel injectors. Additionally, check the condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or weak spark from the spark plugs can also lead to such issues. Below are the main reasons for severe idle vibration in the Excelle: 1. A dirty or damaged throttle body affecting idle vibration. First, clean the throttle body; if the issue persists, the throttle body assembly may need replacement. 2. Non-functioning spark plugs causing misfires and idle vibration. Inspect the spark plugs and ignition modules for potential faults. 3. Aging or cracked rubber components in the engine and transmission mounts. These components can no longer absorb the engine's vibrations, leading to idle vibration issues.
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