What causes the buzzing sound when accelerating in Haval H2?

[DiQuinn]

Great Wall Haval H2 may produce a buzzing sound when accelerating due to the turbocharger engaging, with the noise originating from the turbo section. It could also be caused by carbon buildup in the engine's intake system. A detailed diagnosis by a repair shop technician is recommended for accurate identification. Below are additional details: 1. Engine oil deficiency: If pressing the accelerator results in poor acceleration, lack of power, and a hysterical engine noise, this most commonly occurs when the engine is hot, cold, or low on oil. Small-displacement engines may also exhibit this when accelerating too aggressively. 2. Potential causes: Issues can stem from the air filter, spark plugs, ignition wires, fuel, fuel filter, fuel vaporizer, fuel pump, or related components.

[OQuinn]

This car makes a squealing noise when accelerating. I've encountered a similar situation before, and it's likely an issue with the belt tensioner or pulley. When accelerating, the engine spins faster, and if the belt is loose or the tensioner fails, it can slip and create friction, producing this sharp sound. The engine compartment layout of the Haval H2 is relatively compact, making the belt system prone to wear, especially after frequent driving. I recommend opening the hood first to check if the belt has cracks or is loose. If the noise is accompanied by a lack of power or increased fuel consumption, it's best to get it checked immediately. Don't let the problem worsen—if it turns out to be a bearing failure, it could be more troublesome. It's safer to have a professional diagnosis and repair at a service shop. Usually, minor issues can be fixed by replacing a part.

[LeEverly]

My Haval H2 also had this issue before. The annoying hissing sound during acceleration was quite disturbing. Later, it was diagnosed as air intake pipe leakage or loose connections, where air squeezing in and out caused the noise. Such problems are common in Haval models, especially after frequent high-speed driving. A simple check method is to rev the engine hard after starting and listen for the sound source: if it's near the front hood area, it might be pipe-related; if it's close to the wheels, it could indicate bearing damage. Don't tamper with electrical wiring yourself as misoperation is easy. I got it fixed by replacing the intake pipe sealing ring at the repair shop. Reminder: regular cleaning and maintenance of pipes can extend component lifespan and save money.

[Robles]

I just started driving this car and it makes a zizi sound when accelerating, like a little bug chirping, which worries me a lot. Asked a friend, who said it might be a small component like a loose belt or a leak in the intake pipe. First, check the belt under the hood: see if there's any obvious looseness or wear; also check if the pipe connections are loose. Safety first! If the noise gets louder, don't force it and go to a repair shop immediately. For beginners, it's recommended to let a mechanic check it with instruments to avoid wasting time.