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Information regarding Boxster cold start up and Vario-Cam.

jcorallo

By jcorallo
in 986 Series (Boxster, Boxster S)

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jcorallo Member

jcorallo

Posted
Posted

Hi,

Does anyone have any genuine (i.e. not guessed) technical information regarding the cold start and Vario-Cam strategy on the Boxster engines?

Mine is a 1997 UK model. Dont know if its relevant, but its a 5sp manual. This engine has two Hall Senders (Camshaft Position Sensors), but only one of them is hooked into the DME (the one nearest the rear of the engine / transmission end).

What sequence of events should be observed during cold start, for example, as viewed through an OBD2 scanner? When should the DME go into closed loop Lambda control?

Under what precise circumstances does the Vario-Cam solenoid activate? I read somewhere the cut over was dependant on oil temp? At what RPM's and what cam timing does the Vario-Cam give?

Thanks in advance.

Jules

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