Is it a mk3 or mk4 Mondeo tdci? (presumably its a mk3 as it says "130")
Mk3 Mondeos do not have DPFs, (diesel particle filter) just a small, passive (non- electronic) catalytic converter
It could be a number of things, including transmission shunt caused by play in the DMF (dual mass flywheel) that can interact with the anti - stall, or it could be a "feedback loop" in the anti- stall - just use a bit more throttle,/ revs - it is not good for the engine/ trans/DMF to let the engine "labour" anyway
There are other things that can cause this, a good service can help, and cleaning out the inlet manifold, and take it from there
Thanks for the reply.
I believe it's a Mk3 (the one before the current model). Glad to hear it doesn't have a DPF as they can be trouble.
I don't like the sound of the potential DMF issue. It's an ex lease car so although the mileage is high, I think it has spent most of those miles in 6th gear on the motorway rather than stressing the DMF.
I should point out I never labour the engine - I get the new problem when driving on light or no throttle. Revs are high enough for it not to be that that's causing the shunting.
I used to road test cars for a living so I'm quite in tune with what's happening, but shunting has only recently started. I just wondered if it's a common problem that could be sorted by, say, adding injector cleaner to the fuel system.