abucathy
31-03-2007, 07:37 PM
Bought a 1998 T4 2.5 TDI with an automatic box. There's a pluggy socket thingy on top of the gearbox which I'm told should have a knock sensor attached which connects to the ECU. There isn't one and I'm told that it's crucial for accurate timing to be maintained. Apart from an irregular hot idle (cold is fine at 850 rpm) it runs well. Does anyone know anything about this and if I can get a wiring diagram for it? Thanks:confused: