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topmech0

cold misfire and cel on

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Hi everyone. I have a Cayman S 2006 here and has a random misfire only from cold. With the Piwis it gives fault codes P0300,P0301 and P0303. I have changed all coils to updated version and spark plugs although all looked good. I changed the AOS as found small amounts of oil in the intake but still get same codes.

Start from cold and after a minute or so misfires, CEL on and running rough. If I turn off and restart everything clears. sometimes it will come back on soon after but usually then its totally fine. Any ideas? Am going to play a little more with PIWIS but all activations etc seem normal but I only have a few minutes when first run engine everyday or I simply end up with good running engine and the fault codes above.

The camshaft deviations and figures seem to be ok as I just checked them.

Edited by topmech0
update

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Hi,having same problem with my 06 cayman s.However it will throw a CEL when revved over 4000rpm.I believe variocam system not working.New oil,filters,plugs,variocam solenoid and rest of solenoids checked and still no cure.Car runs perfect 1000-4000 rpm so dont believe its a mechanical issue,more electrical? Please help!!

Hi topmech0,did you get your problem sorted?

 

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Mine was the solenoid for the valve lift system. The one nearest to middle on each bank. I found it by swapping left to right then waited for CEL to come on and hey presto the fault had swapped sides to cyl 5. Swapped for new and no problem since. 

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