Strange engine reaction

[antman99]

Hi.

Had a very strange experience earlier with my d4 vea manual.

Haven’t driven it for 2 weeks as now have an i3, got in moved it off the drive as it is in for service and mot tomorrow I then move again and nearly stall it but instead of the usual behaviour it started bouncing like a kangaroo and the engine sounded like it was firing on 2 cylinders or something odd, only way to stop it was press stop button, restarted no problem.

Checked with foxwell fault code reader and nothing found.

Any idea what this is, it has done 50k miles and never seen this before and a bit concerned as the extended warranty is out at the end of the month and have just discovered the official Volvo extended warranty does not pay for any diagnosis.

Thanks