Why Does the United Bravo Engine Produce Knocking o r Tapping Sounds During Acceleration?

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Why Does the United Bravo Engine Produce Knocking o r Tapping Sounds During Acceleration?

Many United Bravo owners experience a knocking o r tapping noise from the engine, especially when accelerating o r climbing hills. This issue is often caused by low-quality fuel, incorrect ignition timing, o r carbon buildup inside the combustion chamber. In some cases, poor-quality engine oil o r loose engine mounts can also contribute to the sound. Why does this happen so frequently in the Bravo, and what can drivers do to prevent long-term engine damage?

Talha Kyanii asked on 31 Oct 2025 11:22:24 am

1 Answer

8 views |

Gari Master - on 31 Oct 2025 11:26:15 am

The knocking o r tapping noise during acceleration is one of the most common engine-related issues in the United Bravo. It usually happens because of poor fuel quality, incorrect ignition timing, o r carbon buildup inside the cylinders. Pakistan’s fuel quality often varies, and since the Bravo’s small 800cc engine isn’t finely tuned for such variations, it’s more prone to knocking.

Main Causes:

Low-octane o r poor-quality petrol below 91 RON

Incorrect ignition timing o r weak spark plugs

Dirty o r clogged fuel injectors

Loose tappets o r worn engine mounts

Solutions & Prevention:

Always use high-octane o r premium-grade petrol if available.

Have the engine tuned by a qualified mechanic every 5,000–8,000 km.

Regularly replace spark plugs and clean injectors.