2011 Fabia 1.2 TSI 105 dies/no start intermittently

[Sissipaska]

Car: 2011 Fabia Scout 1.2 TSI 105. ~240,000 km as of today. Always serviced at least annually during its life and not been on Variable Service since a few years back.
The problem: car dies suddenly sometimes when driving.  It just stops running without any jerking or hesitation and comes coasting to a stop. Then after maybe 5 min the car starts like nothing again. Sometimes it doesn't start when parked warm but then does it after some minutes of waiting.
How the car drives: It idles good, albeit somewhat lumpy. Fuel economy unchanged. OBD-reading shows nothing out of the ordinary when driving.
Fault codes in VCDS: none. Checked fuel pressure during operation which seem to be OK.

Parts I've changed: In-tank fuel pump, fuel filter, fresh fuel, battery. The new fuel pump relay will arrive next week.
Parts I've checked: voltage during operation (>13.9V constant) cleaned all sensors, checked all the wiring, checked the spark plugs, checked the HT leads, banged with a hammer on various parts  caveman-style.

The car was bought in 2019. The timing chain was changed before the previous owner bought it in 2014. I don't believe that and the chain makes a bit of a rattling noise in the first 2 seconds sometimes when starting so this will be changed in the near future for piece of mind.
I'm leaning towards three parts: the ignition coil (since I'm able to replicate the error by pulling the 4-pin connector to it during operation without no fault codes), the HPFP on top of the valve cover or the ECU.

Anyone who can help me with some suggestions or experience?

[Sissipaska]

I'll answer with the solution myself. It was the ignition coil that was faulty. Probably some internal part that automatically shut off due to heat because the car would always start after a couple of minutes of cool down.

 

No fault codes or DTC stored in VCDS. The car had felt a bit sluggish for a while and the fuel economy was much worse than it is now.





 

[rum4mo]

Good result there!  

 

Even better for reporting back what finally fixed it!