What Causes the Roewe 350 to Shake?

[McHaley]

Roewe 350 engine shaking may seem insignificant, but prolonged shaking can affect the driving environment and even lead to major malfunctions in severe cases. Engine idle shaking is usually caused by the following situations: 1. Intake system issues such as intake manifold or various valve leaks, excessive carbon buildup in the throttle and intake passages, idle air actuator malfunctions, or inaccurate intake volume. 2. Fuel injection system problems including injector malfunctions, incorrect fuel injection pressure, or inaccurate fuel injection volume. 3. Ignition system faults such as spark plug or high-voltage line failures, and incorrect ignition timing. Checking engine shaking requires many professional tools, such as a multimeter, exhaust gas analyzer, fuel pressure gauge, and cylinder pressure gauge. It is recommended that if owners notice engine shaking, they first conduct a visual inspection themselves and then visit a 4S shop for troubleshooting.

[McAnderson]

The most common cause of vibration in the Roewe 350 is aging engine mounts. The engine is fixed to the car body entirely by these rubber components, and once they crack, they lose their damping effect, causing noticeable vibration in the steering wheel and seats. Last year, my car also shook badly when waiting at traffic lights, especially after turning on the air conditioning. Upon inspection, the right engine mount was found to be cracked into three pieces. Another possible cause is a misfiring cylinder, where a single cylinder not working disrupts the balance, often due to issues with the ignition coil or spark plugs. In such cases, it's necessary to first read the fault codes and then check the condition of the engine mounts. Loose chassis components, such as damaged lower arm bushings, can also cause vibration, so a comprehensive inspection is recommended.

[SanDante]

Engine imbalance is most likely to cause shaking. Based on my experience, with the Roewe 350, 80% of such issues stem from the ignition system. First, check if the spark plug gap is too wide or clogged with carbon deposits. Last time when I helped my cousin inspect his car, we found all four spark plugs had cracked ceramic bodies. Next, measure the resistance of the ignition coils, as degraded coil performance can lead to misfiring in a single cylinder. If these components are normal, then inspect the fuel injectors. Insufficient fuel pressure or clogged nozzles can disrupt the air-fuel mixture ratio. Carbon buildup on the throttle body exceeding 0.5mm can also cause fluctuations in air intake, making the tachometer needle jump during driving. Finally, check the engine mounts. If you find cracks when pressing with your fingers, they must be replaced.

[JacksonLynn]

Improper tire dynamic balance is particularly prone to causing steering wheel vibration. I just dealt with a similar issue recently. My Roewe 350 would make my hands numb when exceeding 70 km/h, and after rebalancing, we found the right front wheel was off by 35 grams of counterweight. Tire bulges or wheel rim deformation can also cause this, especially after hitting big potholes - you need to be extra careful. Worn universal joints on the drive shaft will produce clicking sounds accompanied by vibration during acceleration. If the CV joint boot leaks and the grease runs out, it directly causes metal-to-metal friction vibration. I recommend lifting the vehicle at a repair shop and rotating the wheels to listen for abnormal noises. This type of mechanical vibration usually intensifies with increasing speed, making it easy to diagnose.

[SanCharles]

Fuel system issues can cause idle shaking, which becomes particularly noticeable in my car when the fuel tank is down to a quarter full. A fuel filter that hasn't been replaced for over 20,000 kilometers is prone to clogging, leading to insufficient fuel supply pressure and causing engine surging. Carbon deposits on the fuel injectors can block the spray holes like sprinkling pepper, creating misfire zones in the combustion chamber. Another hidden factor is the carbon canister purge valve; if it gets stuck, fuel vapor can directly enter the intake manifold, causing sudden changes in the air-fuel mixture concentration and triggering shaking. Using a diagnostic tool to read the data stream can reveal abnormally high short-term fuel trim values, all of which require specific checks on the fuel line pressure.

[DiRemington]

Wear and tear of chassis suspension components is a common cause of body shaking. When the front wheel bearing clearance exceeds the limit, the rotation of the wheel can pull the entire vehicle off course. Cracked stabilizer bar bushings cause squeaking and shaking when going over speed bumps. Excessive play in the tie rod ball joints leads to increased steering free play. From my experience, shaking is more noticeable during cold starts in the morning but reduces after driving for a few minutes as the rubber components warm up, which is a typical symptom of bushing aging. It's recommended to lift the chassis and shake the tires to check for play, focusing on the control arms and stabilizer bar connection points.