When I first saw the vehicle there was a lot of soot on, and around, the back of the car, which, in hindsight, probably said 'I'm running rich and you'll find that the bypass hose is split.' My '07 407 manual with RHR does not have the bypass hose nor does the wife's '10 308. car : peugeot 407 (2004-2010) engine : 2.0 hdi 136hp diesel trim : premium pack year: 2008 transmission: 5 speeds automatic mileage: 172000kms hey guys, major mb for another video, today i. This can happen at different speeds, not just 30 MPH. Then sometime during these ailments the DPF sensor failed, and I don't know what it's failure would have done for regenning - but i do know that just changing it did create an immediate improvement to how the engine ran. Problem details Engine/RPM surging 2005 Peugeot 407 2.0 SW Problem Details The engine revs fluctuate around 200 RPM at various car speeds whilst driving, for example if you are maintaining 30 MPH due to a speed restriction the car will lurch just like a learner driver is driving. It is theorised that in the past the intercooler bypass hose only had a small leak which would cause an underboost situation while the MAF told the ECU to supply fuel commensurate with what it knew and consequently the engine was constantly overfueling for the inlet air it was actually receiving and over time the DPF has become quite badly clogged. Though the engine runs OK now it will still, when pushed a bit hard, throw up the DPF icon which leads me to think that it may have to receive a forced regen. it suffers from a slight juddering when i am at a constant speed.

it has started to develop at odd times surges a. But worst off all at particular - Answered by a verified Peugeot Mechanic.

Morning JB405, The other day I found that the fuel cap was wounded so it was replaced, and in view of dcc236's comment of 16 Aug it seems that the faulty cap may have been adding to the original issues. I have a Peugeot 307 2.0 HDi, the speed slightly fluctuates when driving normally.

Peugot 407 2.0 hdi surging