Okay, now it all makes sense. The starting problem wasn't due to the glow plug system, but to the injection timing!
The KW screw has come loose, and now my KW suspension is broken. The groove is worn out. This has already happened to me about 80,000 km ago. Back then, the Ford workshop spent about a week trying to find and fix the problem. Now I have to do the same thing again, as I no longer have a warranty, and nothing is covered under goodwill.
MFG
