hi all i was having a look around the engine bay of my 19tdi pd today whilst waiting for the oil to drain and found some wires taped up upon further investigation i found a resistor link on the fuel temperature sender the wires had been cut and linked with a resistor soldered in also found some small vacuum pipes disconected and blanked off one of them went to a small valve just behind the drivers side headlamp and the other went to some sort of valve it was about 2 and half inch diameter and made of stainless steel that sits top left of the engine and as a sort of vacuum activated plunger on it any idea whats gone on here any advice would be appreciated