The stop solenoid is part of the engine, it is screwed into the
engine and looks like a temperature sensor ie with one or two connectors for wires.When you turn off the ignition a ball bearing closes the fuel line to stop the engine.They can
stick in place especially with these low sulphur fuels.You can
take out the ball bearing/then replace housing to get you back on the road but you have to stall the engine to get it to stop.Plus all air has to be bled out of system which could also
be the cause of your problem.
Some garages/motoring organisations tell people they need a new diesel pump, but it is usually the stop solenoid which cost about £30, not the £300 plus for a new pump.Especially in cases where the car suddenly stops after no previous signs of problems.They should take out the solenoid and get you back on the road in 1/2 hour!!Find out where you local taxis take their cars/thats the best garage for diesels usually!
r.simms
January 2007