Stuttering Citroen Dispatch

[Volksy]

A mate of mine has one of these for his catering firm, it's developed an occasional stutter/kangeroo tendancy. I had a look at it and it appears that there is some kind of air flap in the intake system that is being randomly accuated by a servo device attached to the expansion tank. Anyone had issues like this before?

[dieselnutjob]

I take it it's a diesel.

Air intake flaps on diesels are only there for emissions and can be disconnected / jammed open for diagnostic purposes.

You might get an error light eventually but reconnecting the flap would make it go away again.

A jammed open EGR valve can do this as well (along with clouds of smoke on acceleration)

[dollywobbler]

Followed a Dispatch recently. He'd clearly got some issue as it wouldn't go faster than 20mph, then would but only kicking out a shit load of smoke. He helpfully put his hazard lights on and kept going at 40mph until he reached a pub. And that is the least helpful post you'll ever see.

[ruffgeezer]

Ok basics first, what engine does it have?

[Volksy]

It's a Diesel, not a HDI, looked like the older Pug unit. to be honest I only gave it a cursory glance over, but noticed the idle note changing, and at revs which seemed to be caused by the flap in the intake pipe.

[Micrashed]

If its not the HDi (DW10) its probably the DW8 1.9

 

My wifes DW10 does this when the EGR gets stuck open.