Hi, just been reading this thread. I have a 1999 TDI 'AFN' with starting problems i.e. beeping noise (variation of one, two and three beeps) and engine will not start. There is no power to the glow plugs when temp sensor either connected or disconnected. Engine just turns and turns and although cranking speed is very good, just wont fire, UNLESS that is I hot-wire the glow plugs straight off battery, then it will cough & splutter after couple cranks until the engine fires up on 2-3 cylinders, at which point I need to remove direct power to glow plugs and it will run sweet after 3 or 4 seconds. Exhaust very smoky for 10 seconds or so until unburnt diesel clears, but once started it runs perfectly. It will also restart very well if hot but as soon as it cools down then I the only way to get it started is the hot-wire procedure. Any suggestions or help would be much appreciated!