Quote:
Originally Posted by Element Tuning
The variable cam sprockets from Subaru have always been spring loaded but it's not the valve springs that control your engine valves.
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This describes the previous AVCS system. The AVCS on the chain motors does not have high pressure springs internal to the cam sprockets. It uses valve spring pressure. This is probably one of the reasons why they've been having issues setting cam codes, as many of them are set when the intake cam gets stuck advanced due to design flaws with the early sprockets.