What s the deal with the old Jetta shaking when driving at low speeds?

1. The vehicle shakes when accelerating and driving

The most common fault of jitter during acceleration is that the spark plug is damaged, the spark plug pole gap wear leads to insufficient ignition of the spark plug, the mixture is not fully burned and the acceleration is jitter, and there is a crack in the ceramic part of the spark plug, which causes the spark plug not to ignite, and a cylinder that does not work will also lead to acceleration jitter.

The quality of gasoline is not good, resulting in the poor atomization effect of the fuel injector, and the mixture is not fully burned in the cylinder, so it will also lead to idle shaking.

The most common fault of shaking while driving is that the tread of the four-wheel tires has uneven faults, such as bulging and foreign objects. In addition, the loose bearings of the wheels will also cause the moving vehicle to shake.

2. Steering wheel shake at high speed:

The common fault point of high-speed steering wheel shake is that the dynamic balance of the two front wheels is not enough, so it is recommended to adjust the dynamic balance data of the next two front wheels.

The above is the common fault point of vehicle type shaking, if the vehicle has a driving jitter failure, it is recommended to check it as soon as possible.

This fault involves many aspects, such as fuel pressure, ignition coil, sensor signal, cylinder pressure and timing, etc., which need to be fully checked. If the fault phenomenon is obvious, it is best to use the computer to do the overall test first, and carry out the next step of maintenance according to the fault log.

What is the reason for the old Jetta starting shaking, it may mean that the slippage is caused by dirty throttle or injectors. The engine is shaking while it is running. Car owners are advised to clean up the carbon deposits.

Due to carbon deposits and dirty throttle nozzles, the power drops, so the car shakes when idling and starting. The engine is shaking while it is running. Car owners are advised to clean up the carbon deposits.

Due to carbon deposits and dirty throttle nozzles, the car shudders when idling and starting. The car can be started by ignition, allowing the engine to idle, and then slowly releasing the clutch pedal and increasing the throttle to start. If the body shakes obviously, the clutch is shaking, the positive pressure distribution between the active driven disc on the car is uneven, the compression spring elasticity of the constant mesh clutch is uneven, the pressure plate is stressed unevenly, it is easy to cause the pressure disc to tilt, cause the active driven disc to contact poorly, and the clutch will shake.

In this case, the clutch pressure spring should be replaced or leveled. The clutch lining is not in good contact, and the surface becomes hard or sticky with a gelatinous object, which can easily cause the clutch to shake. At this point, the clutch lining should be reconnected to resolve the issue.

Excessive carbon deposition in the spark plug will cause the spark plug to leak and the engine will not work, and the engine will shake. Cleaning the throttle is mainly for the unstable idle speed of the engine, if not cleaned in time, it will cause the engine to stall in serious cases. Millions of car purchase subsidies.

The throttle valve and nozzle may be dirty. It is advisable to inspect and clean the carbon deposits. Because of the carbon deposits and the nozzle of the throttle are dirty, the power drops, so the car will shake a little when idling and starting.

This can be solved in the following ways:

First, let the engine idle, put on low gear, slowly release the clutch pedal, and press the accelerator to start. If the body is visibly shaking, the clutch is shaking.

Second, the positive pressure distribution between the driving disc and the driven disc is uneven. The constant mesh clutch compression spring elastic force is uneven, the adjustment of each release rod is inconsistent or the diaphragm spring is uneven at the end of the separation, which will make the compression time inconsistent first and then inconsistent, the pressure plate is uneven, and even the pressure plate is skewed, resulting in poor contact between the driving disc and the driven disc and the clutch shaking. At this time, the clutch hold-down spring and the leveling release lever should be replaced.

The third is that the spring force of the clutch torsional damping spring becomes weaker, the spring force of the clutch compression spring becomes weaker, and the diaphragm spring is cracked. When engaged, it can cause the clutch to shake. At this point, the spring should be replaced.

4.Poor clutch linings, hardened casework, or adhesive can all contribute to clutch shaking. At this point, the clutch lining should be reconnected.

5.When the driven disc is warped, skewed, and deformed, and the clutch is engaged, the clutch lining will produce irregular contact, and the pressure cannot increase smoothly. At this point, the driven disc should be calibrated or replaced.

There are many reasons for car jitter, it can be too much carbon accumulation on the throttle, aging engine floor pads, or it can be a lack of cylinders in the engine. The lack of cylinder is caused by a faulty ignition system. The main components of the ignition system include the ignition coil and the spark plug.

Causes of idle jitter:

1. The engine has serious carbon deposits. The most common cause of idle judder is excessive carbon build-up on the throttle or injector. When there is too much carbon deposition inside the engine, the gasoline sprayed by the fuel injector during cold start will be absorbed by a large amount of carbon deposition, resulting in too thin mixture, making it difficult to start.

After the car is hit, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the engine for combustion, which will make the mixture thicker. The mixture is sometimes dilute and sometimes thick, which will cause idle jitter after cold start. The lower the temperature, the greater the amount of oil required for cold starts, and the more the presence of carbon deposits affects cold starts.

The solution to the problem is to clean the carbon deposits at the throttle and fuel injector.

2. Poor ignition system and poor ignition of spark plugs will also lead to engine idling and shaking. If there is a problem, check if the ignition system is faulty and if there is too much carbon deposited in the spark plug.

3. The oil pressure is unstable. If you have cleaned the engine carbon deposits, cleaned the throttle valve or replaced the spark plug, and there is still the problem of body shaking when idling, it is recommended to go to the 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal. If the oil pump supply pressure is not normal or the intake pressure sensor is incorrect, it can also cause the body to shake when idling.

Solution; The best way is to clean the oil circuit, clean it regularly, there is no specific experience in the research and development parameters of the clean engine from the new car, coupled with the continuous improvement of emission standards, can not adapt to the change of fuel, all manufacturers of the engine are unable to solve this jitter problem in the short term, plus the fuel quality is not very good or the initial fuel of the new car factory is stored for too long, resulting in a rapid increase in the colloidal composition of the oil circuit, which will continue to pollute the fresh fuel and cause no good fuel to participate in combustion in the later stage. The occurrence of excessive carbon deposits is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits. The use of PNF dope fuel additives can solve the problems caused by carbon deposition.

It is recommended to check and clean the carbon deposits, due to the carbon deposits and dirty throttle injectors, the power has decreased, and the car is a little shaky at idle speed and starting.

It can be solved like this:

1. Let the engine idle and put on low gear, slowly release the clutch pedal and increase the throttle to start, if the body is obviously shaking, it means that the clutch is shaking.

Second, the positive pressure between the main and driven disks is uneven. Often the engagement clutch compression spring elasticity is uneven, and the adjustment of each separation lever is inconsistent or the finger end of the diaphragm spring separation is uneven, which will make the compression time inconsistent, the pressure plate is unevenly stressed, and even the pressure plate is skewed, causing the main and driven disc to contact poorly, causing the clutch to shake. At this time, the clutch compression spring should be replaced, and the release lever should be leveled.

Third, the clutch torsion damping spring will weaken the elastic force, the clutch compression spring will become weaker, and the diaphragm spring will cause the clutch to tremble when engaged. At this point, the spring should be replaced.

Fourth, the clutch lining is in poor contact, and the surface is hardened or glued to the gel, which is easy to cause the clutch to tremble. At this time, the clutch lining should be re-connected.

5. When the driven disc is warped, skewed and deformed, the clutch lining will produce irregular contact during the clutch engagement, and the pressure can not increase smoothly. At this point, the driven disc should be calibrated or replaced.

Photo by Lu Liting) NIO EC6 Xpeng P7 Marvel R VOYAH Free Audi A4L Model Y @2019

Summary. If the oil pressure is unstable, if the engine has been cleaned up for carbon deposits, the throttle has been washed, the spark plug has been replaced, etc., and the body is still found to shake when idling, it is recommended to check whether the fuel supply pressure and the intake pressure sensor are normal, if the oil pump supply pressure is abnormal or the intake pressure sensor value is wrong and the work is poor, the body shake will be caused; Engine parts are aging, and car jitter is also related to the aging of engine feet. The engine foot is responsible for absorbing the subtle vibrations of the engine when it is running, and if there is a problem with the engine foot, these vibrations can be transmitted to the steering wheel and cab, causing shaking during idling.

Hello dear! Very high bench mausoleum shed xing for you to answer! Jetta car shake because of the serious carbon deposition of the engine, the common cause of car shake is that the throttle is too dirty or Wang Bi fuel injector has too much carbon.

When there is too much carbon deposit inside the engine, the gasoline sprayed by the cold-start fuel injector will be absorbed by the carbon deposit; <>

If the oil pressure is unstable, if the engine has been cleaned of carbon deposits, washed the throttle, replaced the spark plug, etc., and still finds that the body shakes when idling, it is recommended to check whether the fuel supply pressure and the intake pressure sensor are normal, if the oil pump supply pressure is abnormal or the intake pressure sensor is wrong and the work is poor, it will cause the body to shake; The aging of engine parts and the shaking of the car are also related to the aging of the engine feet. The engine foot is responsible for absorbing the subtle vibrations of the engine when it is running, and if there is a problem with the engine foot, these vibrations can be transmitted to the steering wheel and cab, causing shaking during idling.