My 2008 Dodge ram 1500 with a hemi keeps on dying at the stop signs

My 2008 Dodge ram with a hemi 1500
series. Sporadically dies at a stop sign or
when going down a hill this does not
happen very often maybe once or twice a
month. I have taken it in to the dogs
dealership several times and they say there
is nothing wrong with it it does not throw
code and I can’t make it d my 2008 Dodge
ram with a hemi 1500 series. Sporadically
dies at a stop sign or when going down a
hill this does not happen very often maybe
once or twice a month. I have taken in to
the dogs dealership several times and they
say there is nothing wrong with it.   There is
no code when I hook their machine up to it
I am I cannot make it die when they take it
for test drive.