What Causes the Clicking Sound in Magotan's Engine?

[DeMason]

Magotan's engine making a clicking sound is a cold start noise. The following are the reasons for cold start noise: 1. The oil pump has not fully established oil pressure during cold start, causing insufficient lubrication of components. 2. Abnormal noise from the carbon canister purge solenoid valve: The noise from the carbon canister purge solenoid valve is caused by intermittent switching responses when the fuel is opened, which is a normal phenomenon. Below is an introduction to the working principle of the carbon canister purge solenoid valve: 1. Carbon canister: The evaporative emission control system has an activated carbon storage canister. Fuel vapor from the fuel tank enters the carbon canister through the pipe marked TANK. Liquid fuel entering the carbon canister is stored in the reservoir at the bottom of the carbon canister to protect the activated carbon base in the upper part of the carbon canister, while the fuel vapor is absorbed by the activated carbon. 2. Working principle and location of the carbon canister purge solenoid valve: The carbon canister purge solenoid valve controls the purging effect of the carbon canister through the modulation of electrical pulse width. The ECU computer, based on different engine operating conditions, grounds the solenoid valve circuit at a certain frequency to turn it on or off. The ECU computer controls the vacuum of the purging carbon canister by operating a normally closed solenoid valve.