hi ,im am not new to deisels,i am a H.G.V. teck but i reciently got stuffed in a deal with a MAREA td100,i intend to keep this as it is ideal to use for sea fishing,i have changed the cam-belt,oil/fuel/air filters. to get the motor running i put the fuel system on a 1 gallon can, it ran with only the smallest derv knok, i then changed the fuel filter (what a mess)full of red!!! and slurry,next came the AIR filter, black and not a nice item. however since the tank has been off and cleaned and real derve put through the system the motor refuses to start, i have pure derv in both the filter/pump, but the pre heat has started to click in and out straight away...P/S i only was given a blue KEY with this car!!!!! any IDEAS !!!!!