voyager 2.5td problem!(1998)

hi i have a 1998 voyager 2.5td ,the problem i have is that it randoml
cuts out the glow plug light flashes ,switch off ignition then it wil
start first time and maybe ok for the rest of the day or weeks or it ma
do it a couple of times the same day,seems to do it when slowing dow
like today my wife was stopping at some traffic lights it cut out an
has been fine for the rest of the day
i have changed the crank sensor it has been just over week sinc
changing the sensor,also have pulled on the loom with it running couldn
get it to faulter
iam a bit reluctant to have it plugged in at chrysler for them not t
find a fault ,i have tried the dash menu but no stored codes and hav
had it plugged into a solus scanner again no fault stored

hope some one can help
da