I have recently experienced some strange stuttering when cruising at around 70mph. The car loses revs for a split second before regaining power. The car jolts when this happens, I assume because it is suddenly loosing power. The car seems to hold its speed and normally stops doing this after a few flutters in a short space of time. I've also noticed that this seems to happen after stopping mid-way during a long drive.

I'm wondering if this is a Haldex issue, as it does seem to happen more often when going over bumpy sections of the motorway. I've also experienced this once at lower speeds (around 30mph), where the engine lost complete power after jumping and jolting in and out of revs, and had to be restarted from a standstill.

I have no dashboard warning lights, and I don't have any codes after scanning with OBD2.

Other than this, the car drives perfectly well.

Any suggestions as to what the cause may be are appreciated!!

Intermittent faults without codes are often electrical or fuel-related.

Checks to perform:

-Inspect fuel filter, fuel pump, and fuel lines.

-Swap or inspect ignition coils and plugs.

-Check intake hoses, intercooler piping, and vacuum lines.

-Inspect engine wiring harness for loose or corroded connectors.

Consider logging live data while driving (fuel trim, throttle position, engine load) to catch transient drops.

The Haldex is unlikely to be the root cause, but checking it for leaks or strange noises is reasonable given your observation over bumps.

Based on my experience with the Octavia, I recommend starting by checking the crankshaft sensor.

Edited 19 October, 202519 Oct by klodtn