What Causes the Abnormal Noise in Highlander?

[LeJune]

It may be due to insufficient engine oil. The reasons for abnormal engine noise in Highlander are as follows: Insufficient engine oil: This leads to inadequate lubrication of various components, resulting in wear and noise. Poor fuel combustion: Low injection pressure, injector dripping, poor fuel atomization, and delayed fuel supply timing can all cause poor fuel combustion, leading to knocking. Advanced fuel supply timing: If the fuel injector starts spraying fuel before the piston reaches the designated position, it causes premature fuel combustion. The high-pressure gas in the cylinder impacts the piston, producing a rhythmic sound, which becomes more noticeable when the throttle is reduced. The following is a related introduction to Highlander: Body