That’s why i said swap the complete rail. A sticking relief valve can cause high fuel pressure error too, either swap both parts to your current rail or just source a used one with parts attached.
Sounds more like a faulty fuel rail pressure sensor. Sometimes cheaper and easier to find a secondhand fuel rail with the sensor and relief valve attached and just swap that over. Doesn’t need to be a Type S, a standard 150bhp fuel rail will work.
Could be a sticking egr valve. Try temporarily blanking it at the inlet manifold side. You’ll get an error but you can clear it off with a basic code reader just for the purpose of this test. If it works then consider an egr off permanent solution, drop me a line if you want details.
You can hit around 215bhp with a quality intercooler. Type S turbocharger has a different internal core and cylinder head, not to mention a stronger clutch.
Yes the CMBS relies on inputs from various sensors and systems to be able to operate correctly, you should always run a diagnostic to determine the cause and takeout any guesswork.
common issue normally tied to blocked vanes caused by dpf blockages. I have however seen a split vac line cause it so check your vac lines from the actuator carefully to make sure they’re not pinched or split especially if it’s only happened after reassembly.
Sounds like ecu is not waking up for some reason, and the glow plug light is indicating when that happens. Maybe a faulty ecu. If you can get a matching part number, I can clone these.
Sounds like it’s not detecting the key. Have you got a spare key? Does it do the same thing with both keys? If so then I’m guessing it has a faulty receiver unit (never changed one myself but normally they’re around the ring of the barrel on most cars of this era)