136 hdi dpf

[Toms306]

It'll feel like shit, sound awful and stink... So the same as any other diesel.

But seriously, with the EGR open and the intercooler bypassed you really do feel a lack of acceleration, mine used to jerk badly during a regen as well. You also get a distinctive noise due to the later injections and a hot cat smell, possibly an extra 'dieselly' smell as well. The fan running when you haven't got AC on and having been thrashing it or stuck in traffic is another good indication that a regen is taking place. I could also tell by the MPG dropping off when it should be rising (on the flat at 30mph for example) but for those less anal about mpg that might not be so easy to spot lol.

[tuttyboy84]

I havent noticed that if im honest but im sure it must be doing them as ive done 4k in the last 6 weeks

[Toms306]

Hmm, yeah I would think so in 4k, I think it's 'roughly' 500-1000 mile intervals, depending on driving style etc. How many miles are on it?

[tuttyboy84]

109k now

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And its not like i drive it like miss daisy so there would be plenty of opportunities for hot exhaust temps

[Ruan]

Will the fact i do so many miles mean it will passive regen regardless?

Passive regens are not what you think, the ECU is constantly monitoring differential pressure... The ecu does initiate a regeneration even a 'passive' regeneration, it has to adjust timing and EGR rate to force it to happen... The whole 'take it for a rag' thing is only to help the engine to get up to temperature so that the regeneration will actually happen.

The engines are way too efficient out of it's various regeneration modes to get the DPF hot enough... The obvious 'forced' regeneration when engine speeds are low are what we think of when we mean regeneration, however they're quite rare as usually it's done at higher speeds when it's easier to get the temperature up.

EGR plays a huge role in controlling what happens during regeneration, it also prevents DPF overheating due to excessive oxygen being passed through the filter, you're actually in danger of a thermal runaway without EGR and destroying the DPF filter and catalyst.

[tuttyboy84]

Ok so its either live with it or have the egr/dpf removed once and for all

[Ruan]

Correct.

[Redordead89]

I honestly feel like calling tuttyboy a twat! Blank he one guy who's running the same shizzle FFS!
Twat!

[tuttyboy84]

Why exactly am i a twat?