Flaps? What flaps?
AO Silver Member
Join Date: Oct 2014
Location: United Kingdom
The oil seals in your turbo failed.
This allowed oil from your engine to be fed directly into the intake, this burning oil caused the smell/smoke.
When you took your foot off the accelerator, the diesel fuelling stopped but the oil fuelling continued.
With a turbo aspirated car, the exhaust gas spins the turbo which forces air into the engine. The more fuel that goes in, the more exhaust comes out, which blows in more air, etc.
When you stopped the car and turned off the ignition, the engine was still hot and spinning - this meant that the oil kept flowing into the intake where it carried on burning and driving the engine.
Diesel engines do not rely on electrical spark ignition to cause the combustion, they rely on the compression in the cylinder to supply the heat. They will run and run and run so long as they're getting fuel and air.
Your car stopped when either it ran out of fuel (oil), or something melted/seized.
So, the damage....
The turbo is wrecked, the engine is most likely wrecked (redlined with no oil until it died, this kills the camshafts..), the exhaust might be wrecked, and some of the auxiliary/accessories under the bonnet might be wrecked...
If you wanna try and save it, it'll be a good few thousand at an Independent Alfa specialist...