I own an Alfa 159 tbi with prins dlm 2.0 gpl.
From some time I've started to have misfire. This happen only on cylinder 3 and when I require power (press down the accelerator).
Some rare case the car response correctly (no misfire, no hesitation).
I hope this means that injector and valve are ok.
What could be?
Naturally I've replaced spark plug, Ignition coil and MAF. And precat lambda..

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