engine lumpy on idle 406 hdi

[scanny]

Can anyone help when i start the car up the engine runs lumpy on tickover almost like miss firing but when you rev it up and drive its fine ,ive changed the diesel filter, put injection cleaner in the tank but still the same its not all the while its now and again any ideas

[davidireland]

Get a diagnostic check done. Post faults up if any.

[scanny]

so the diagnosis computer would read a fault without the engine management light coming on the dash

[scanny]

really great forum this is, ill just take it to the garage easy answer

[richiepearce]

Some faults generate an eml others will not but maybe stored. find someone on planet map and have a diagnostic done.

[scanny]

yea had it on a diagnosis snap -on didnt read any faults ,it does the lumpy idle wheather its cold or when the engines hot mainly when its cold

[davidireland]

Originally Posted by scanny

yea had it on a diagnosis snap -on didnt read any faults ,it does the lumpy idle wheather its cold or when the engines hot mainly when its cold

Where are you getting your fuel? is it good?
A high pressure fuel pump fuel pressure regulator will cause hunting sometimes.
If i was you go to a good Peugeot Specialist.

[scanny]

Taken the car to a peugeot specialist and sods law its been fine, but when i got home it started again .just cant work out what it is even when i explained to them they did not know .im thinking could it be a injector getting blocked and just dripping diesel on to the piston rather then spraying to cause it to run lumpy

[scanny]

even had it up on the diagnosis did not pick anything up

[davidireland]

I've just remembered that I had a Citroen Xantia with the same problem, it turned out to be the fuel pressure regulator.
Have you got access to a secondhand maybe to try it.