Low speed pre-ignition (LSPI) is a phenomenon that occurs in some modern engines, causing premature combustion of the air-fuel mixture. This can lead to engine damage like in this case for this
Holden Astra as you can see by one lower compression peak compared to the other three compression peaks.
LSPI is often caused by a buildup of deposits on the piston crown, which can act as hotspots and ignite the fuel mixture prematurely.
Using the right engine oil and the correct type of fuel can help reduce the risk of LSPI.
Posted in Diagnostics
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