Re: ROUGH RUNNING
Welcome onto the boards there...
Maybe not necessary to start 2 threads on the topic.
Cold start doesn't tell much, and highway running doesn't either. WARMED up [Closed Loop] idle quality means more than anything IMO.
Rattling is likely the dual mass flywheel.
What makes you think O2's? Or Coolant Temp Sensor?
Do you have FSM for the car? And a multimeter?
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