
Originally Posted by
vinj
If it happens when the engine is cold, try to check your spark plug specs. Maybe the plug heat range is too cold so you can change to a "hotter"plug. The heat range is usually the number, for example with an NGK BKR6E-11, "6" is the heat range and 11 is the plug gap (1.1). The higher the number the colder the plug so thus a NGK BKR5E-11 is a hotter plug.
Also, if you engine rarely revs high then you also probably have carbon build up which can also cause some detonation.
Try cleaning the MAF sensor too.
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If it happens when the engine is cold, try to check your spark plug specs. Maybe the plug heat range is too cold so you can change to a "hotter"plug. The heat range is usually the number, for example with an NGK BKR6E-11, "6" is the heat range and 11 is the plug gap (1.1). The higher the number the colder the plug so thus a NGK BKR5E-11 is a hotter plug.
Also, if you engine rarely revs high then you also probably have carbon build up which can also cause some detonation.
Try cleaning the MAF sensor too.