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What Causes an Engine to Ping

What causes an engine to ping? Several reasons make the engine ping, however, the reasons will depend on the condition. If the engine produces pinging noise when driving uphill but no noise when driving on normal roads, it means the fuel you use is a low-grade fuel or the air that comes in the combustion chamber is thin.

Causes of Engine Knocking
An engine knocking occurs if the air-fuel mixture is not correct, this will result in the burning of fuel at a different portion in the combustion chamber if this problem always occurs for a longer period this will damage the combustion chamber specifically the piston and the cylinder wall. 
Learn more: Causes of Engine Knocking

Pinging noise is usually related to an engine problem, also pinging can related to low octane gasoline especially while driving uphill. Low-grade gasoline with an octane rating of 88 and below can cause the engine pinging noise because low octane gasoline tends to burn quickly or will self-ignite just before the piston reaches the top of the combustion chamber, this phenomenon is called pre-ignition. Pre-ignition usually happens when the engine is extremely hot and under stress like when driving uphill.

Another reason for pinging noise when going uphill is thin air. It is a fact that the air at high altitudes is thin and when the engine is under severe stress like when driving uphill because the air is thin the fuel will self-ignite in the combustion chamber earlier than it should be thus pinging sound occurs.

To solve this problem is to try to use high-grade gasoline such as gasoline with 92 octanes and up. You can easily found the rating printed on the front of the gas pump. Gasoline with a higher grade tends to resist pre-ignition because it burns slower. Since there is no pre-ignition then there is no pinging sound.

Can I Switch From Premium to Regular Gas
Premium gas is labeled as 91 octanes or higher, and the regular gas is labeled 87 octane rating. Not all cars can use regular or that 87 octane gasoline.
Learn more: Can I Switch From Premium to Regular Gas

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