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I could only suggest plugs or coil pack issues? Intermittent multiple misfires bank 1 can mean one or more cylinders are not combusting correctly maybe swop over the plugs & coil packs in 1 & 4 see what happens
Not to my knowledge, but the repairer did replace the coils and spark plugs. That worked for a day and back to
The old problem. Rerun of tests and fuel pump now identified and replaced Problem solved except for the hefty price tag… $2100 Australian pesos