General Jtd rough running

[HornettAG]

Hello,
First time on something like this
I have 2014 Doblo 1.6jtd and when it’s cold it runs really rough and lumpy it’s better once it has warmed up but it can be a bit rough when warm. No error codes apart from no 1 glow plug circuit fault but that only comes up when it’s very cold in winter.
Timing belt and timing have been done and checked and fuel filter replaced, anyone have any ideas?
Regards

 

[bugsymike]

Hello,
First time on something like this
I have 2014 Doblo 1.6jtd and when it’s cold it runs really rough and lumpy it’s better once it has warmed up but it can be a bit rough when warm. No error codes apart from no 1 glow plug circuit fault but that only comes up when it’s very cold in winter.
Timing belt and timing have been done and checked and fuel filter replaced, anyone have any ideas?
Regards

Any white smoke/unburnt fuel smell when cold starting?
Air/fuel leaks?
Someone recently on Forum had a faulty fuel valve on high pressure pump giving similar issue.
I recently changed the heater plugs on my 2010 Doblo Maxi 1.6 Multijet @106k miles, easy job , just a 9 mm deep socket. All four new Bosch only £37 odd.
If testing them remember they are only 4.4 volts.
My Doblo wasn't causing a problem, it just gave a message on dash "glow plugs".