Strange thing ive notice with octy vrs exhaust

[Dread1977]

Hi all,

 

Just a quick one regarding my PD170 octy exhaust.... ive noticed on a few occasions that after a slightly spirited drive on a motorway or something similar that if i pull up and listen to the exhaust it almost sounds like its blowing, then after a couple of mins it seems to go quiet and the engine note changes.. no i know some of you may say its a regen but the RPM is sitting below 1000 (about 800) so dont think its a regen as the revs are too low.. any one have a clue what this is? i though it could be some sort of exhaust valve but cant find anything on here about it...

 

[silver1011]

EGR valve?

 

http://en.wikipedia.org/wiki/Exhaust_gas_recirculation

[Obsolete01]

Yes I've noticed this aswell. It's like the dpf is regenerating but like you said it doesn't go up to 1k.....so I always assumed it was regenerating....is this not the case? I'm seriously considering either...a) getting a dpf delete or selling and buying a 330d

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[DMilleaVRS]

buying a 330d

Stick with the octy my mates had endless trouble with his 57 330d plus he is gutted that my boot holds more then just golf clubs :-)

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[Obsolete01]

buying a 330d

Stick with the octy my mates had endless trouble with his 57 330d plus he is gutted that my boot holds more then just golf clubs :-)

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True, there is great power in them tho for a diesel.

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[flat-eric]

since dpf removal mine sounds like its full of angry bees!

[Dread1977]

Having read Silvers post on the EGR i suppose its possible its this... interesting that the EGR for want of a better word Fxxks up all of the smooth running of your engine, lessens power etc etc,... think I may just get a petrol car in future and not bother with all this crap..