20 Qi Jun chillers started at 1300 rpm.

Causes of abnormal noise after starting 20 Qi Jun cold cars 1300 rpm;

The reason for the "da da" sound when the cold car starts;

1. Hydraulic tappet: Due to low oil pressure or wear of the hydraulic tappet itself, air enters the hydraulic tappet and produces a "click" sound.

2. Valve clearance: The valve rocker arm is worn, resulting in excessive valve clearance.

3. Dirty throttle: The throttle is too dirty due to the continuous accumulation of sludge and carbon.

4. Working sound of carbon canister solenoid valve: This is a normal sound and can be used continuously. If the noise is too loud, it is recommended to go to the 4S shop for inspection.

The reason for the "click" sound when the cold car starts;

1. Three-way catalytic converter: there is a "click" within half a minute after the cold car starts, and then there is no sound. This is generally the sound made by the expansion of the three-way catalyst after heating.

2. Timing part: There is a loud "click" sound when the cold car starts. Generally, the timing belt or chain is worn, stretched and loosened, and the chain tensioner loses its tensioning function, which leads to this sound.

3. Friction sound of air conditioning belt: If there is noise when the air conditioner is turned on, it may be caused by friction of air conditioning belt.

Reasons for "Knock-Knock" of Cold Car Startup:

1, the fuel tank exhaust valve is not working well.

2. The fluid in the reflux pump has influence.

3. The internal part of the fuel filter is blocked.