Thread: VF570 installed
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      12-14-2012, 09:14 PM   #68
GuidoK
#buildnotbought
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Drives: Z4 3.0i ESS TS2+
Join Date: Jul 2012
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And that was a post 2002 untuned car?
Then the lambda sensor had to be dodgy.
It is unpossible that a mixture gets too lean without the car's ecu knowing about it. If the pump can or cannot supply enough fuel has nothing to do with it.
If the ecu wouldn't know the afr, it wouldn't know how much fuel it would have to give in the first place.
This applies for all modern cars.
So some sensor or mapping had to be defective.
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