having cold start
issues on 159
Join Date: Nov 2011
County: Zuid Holland
make a little test - try to cycle glow plugs three times or more. you know, after the gp light is off press the start button without any pedals. it will remove contact. then press it again and it will give contact. wait for the light to go off and repeat one more time. see if it will have idling problems after that. if not, then suggestion is to change glow-plugs even if you do not have any message from the car. if not, refer to next paragraph.
alfacapone has a point also, but not from the gp point of view. if car is stationary long, and if fuel pump is a little dirty, then it takes longer to pressurize the fuel rail when attempting cold engine start. if you wait for the message, that will ensure enough time for the pump to pressurize common-rail to get injectors working and injecting nicely. i have to point again that with nice and clean system this is not necessary. with dirty or near death fuel pump, bad diesel or soiled injectors, this kind of waiting is a must because lumpy idling will take your DMF pretty soon.
try and see if it works for you.