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Rez,
Remeber next Thursday, Iver, Porsche Club meeting we can have a look at your car and you can have a look at ours.
Dealer did not sound like they done a proper diagnosis. 02 sensor
reading of 0.44 does not mean anything, if anything 0.44(0.45) is
the correct average value it should be registering once warmed up.
Unlikely that a new ECU will sort out things of. Did the dealer check your CAT? Is the exhaust system in good order?
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