Losing Power at 65mph

[mudddy]

I have a 2006 Superb 1.9tdi I've recently had the flywheel and clutch replaced.

I went out on a fairly long journey today, and encountered a continuous issue. When cruising at around 65mph and over the car seemed to struggle for power, I seemed to feel it occasionally mildly misfire every 30 minutes or so.

I've had the car for around 3 years and have always found it to be rock solid and stable on the road, yet today it was a real worry to feel it struggle in this way.

Can anyone suggest what could be causing this or how best to diagnose, thanks.

[skippy41]

_{Disconnect the mas airflow sensor and see if it still does it, if it does thats your problem check all hoses are connected next to the bulkhead}