The engine doesn t sound when it s idling, and there is a clicking sound when the throttle is increa

Car engines.

"Click, click

When increasing the throttle occurs, it can be analyzed from the following:

1. If there is an abnormal sound when the engine is started instantaneously, there will be no abnormal sound when the engine is idled. Then the fault point is most likely the carbon brush inside the starting motor.

There was a malfunction. The starting motor works by means of an electromagnet after being energized.

work, combine the gear of the starting motor with the flywheel of the engine, and rotate at the same time, then the engine can be driven to start, and the gear will quickly return to position after the engine starts. This fault is due to the abnormal sound caused by the gear of the starter motor not returning to position quickly, so it is necessary to check the starter motor.

2. If there is no abnormal sound or abnormal noise at idle speed after the engine starts, or abnormal noise occurs when the throttle is increased, this fault point is likely to be caused by the hydraulic support inside the engine cylinder head and the excessive clearance of the valve. Because the vehicle has more kilometers and the years of use will be longer, the engine valve and hydraulic support will have a certain amount of wear. After the gap is too large, there will be a "click" abnormal sound.

To solve this problem, the cylinder head needs to be disassembled to replace these 2 parts.

Cause: 1) The gap between the piston and the cylinder wall is too large. 2) Poor lubrication of the cylinder wall. (3) Inspection and judgment. Listen at the engine and oil port, the sound is obvious when idling, and plug the spark with a screw.

Tie, listen to each cylinder, identify the sound generated in the ** cylinder, or inject a small amount of oil into the cylinder, install a spark plug, start the engine, if the sound weakens or disappears, and then appears again, it can be determined that the cylinder knocks on the cylinder. If there is still an obvious knocking sound after the engine working temperature is normal, the cause should be found out in time to be eliminated!

Hello, according to your description, if this happens, it may be the engine. The sound of the valve, it is recommended that you go to the store and read this by reading the data stream. VAT data. and recent stress data to analyze, I hope it will be helpful to you.

In general, it may be that the water tank belt is loose, resonance occurs at low speed, resulting in sound, and there is air filter and pipe breakage. If it is judged whether there is an engine failure. Whether there is a stutter in normal driving, whether there is a stall, whether there is an abnormal water temperature, it can be judged that there is no outside, and the parts are worn.

A car idling on a flat road will move forward, as long as it is in gear and the car is on fire. The idle speed is the same, resulting in a low engine speed, which can drive the vehicle forward under a small load.

The driving school is to turn the idle speed up so as not to stall the engine. And remove the throttle cable to avoid accidents.

None of the problems have been solved, what is the reason? How to solve it?

The car is an automatic six-cylinder Passat, and the sound is like a whistle, very sharp. It should be due to two reasons: 1 day of cold oil is relatively condensed, and when it is just started, each component is caused by abnormal noise due to insufficient lubrication.

2. The car is relatively old, and when the car is cold, the gap between the parts is too large, causing abnormal noise (according to your description, it should be the first case).

Follow-up question: When the car is hot, it also sounds, just step on the accelerator and stop, as soon as you release the accelerator, it is very loud, the sound is very sharp, like the whistle during the game, and the idle speed is in place to play the abnormal sound.

Cars are already an indispensable tool for our daily travel, but we will inevitably encounter some problems in the process of using them, such as the problem of abnormal engine idling. If you are interested, let's take a look at my introduction, I hope it can bring you some help. The noise of the engine at idle may be the sound of knocking on the cylinder, and the reason for affecting the knocking cylinder may be that the gap between the piston and the cylinder is too large.

Knocking is very harmful to the engine, and knocking can also affect engine knocking.

Detonation is an abnormal combustion phenomenon in an engine. When the piston is in the compression stroke, the piston runs upwards to compress the combustible mixture, and the pressure and temperature of the combustible mixture will rise substantially.

If the combustible mixture is ignited before the spark plug ignites**, this is a knocking phenomenon.

If the combustible mixture is before the piston ignites**, the piston will be pushed down, but the piston is running upwards, which will cause damage to the engine and also affect the reduction of engine power.

Guys, don't underestimate the knock on the door. Severe knocking can affect the phenomenon of connecting rod deformation and pistons** in the engine.

Knocking is usually caused by a low octane rating of gasoline or excessive carbon build-up on the top of the engine piston. If there is too much carbon deposited on the top of the engine piston, it will affect the improvement of the engine compression ratio, thereby increasing the probability of engine knocking.

Summary. The abnormal sound of the car idling is gone as soon as you step on the accelerator, which is likely to be caused by the work of the carbon canister solenoid valve, because the carbon canister solenoid valve will realize intermittent opening and closing action when working, so that the idle clatter and refueling disappear, which is a normal phenomenon. Its function is to open the solenoid valve when idling, and the gasoline vapor and fresh air in the canister are sucked into the cylinder for combustion, which can reduce emissions to a certain extent.

When the canister solenoid valve fails, the engine will be unstable when idling, and there will be a lack of power when accelerating. The most common is that the filter screen of the air inlet of the canister is blocked, and the air entering the cylinder will be reduced after being blocked, but the gasoline vapor is still a normal amount, and the combustible mixture will be too thick. When the combustible mixture is too thick, the ECU will reduce the current fuel injection volume, which will cause the combustible mixture to be too thin, and the speed will become lower at idling.

The abnormal sound of the car idling is gone as soon as you step on the accelerator, which is likely to be caused by the work of the carbon canister solenoid valve, because the carbon canister solenoid valve will realize intermittent opening and closing action when working, so that the idle clatter and refueling disappear, which is a normal phenomenon. Its function is to open the solenoid valve when idling, and the gasoline vapor and fresh air in the canister are sucked into the cylinder for combustion, which can reduce emissions to a certain extent. When the canister solenoid valve fails, the engine speed will be unstable when idling, and the power will be insufficient when accelerating.

The most common is that the filter screen of the air inlet of the canister is blocked, and the air entering the cylinder will be reduced after being blocked, but the gasoline vapor is still a normal amount, and the combustible mixture will be too thick. When the combustible mixture is too thick, the ECU will reduce the current fuel injection volume, which will cause the combustible mixture to be too thin, and the speed will become lower when idling.

Okay, thank you!