6. Inspect the air fuel ratio in the gasoline engine
When the malfunction affects all cylinders, it is important when troubleshooting to judge whether the A/F is rich or lean. In this inspection, perform Read more Automotive Idling Troubleshooting 2 of 2 ›

The problem symptoms due to poor idling are classified into two groups.
• The engine does not smoothly turn and the engine vibrates.
• The idling speed is abnormal (the speed is high, low, hunting). Read more Automotive Idling Troubleshooting 1 of 2 ›