definitive answer to EGR delete

[onix]

Hello,

I have a 2013 C4 with a 1.6 eHdi DV6C engine (same as the Berlingo)

I will take it to get remapped, and i am thinking about what to do with the EGR valve.
I want to leave the DPF working, what would happen if i disabled the EGR valve, but left the DPF working?

Some people say that the EGR is used in a DPF regeneration cycle, some say it is not;
Some people say that turning the EGR off will make the DPF clog much quicker, other people say its the complete opposite!;
Some people say that the EGR valve plays a key role in the DV6C engine and that without it the engine will start acting up in all sorts of ways.

So could anyone with the knowledge tell me what will happen if i remove my EGR, but leave the DPF functioning, assuming i do a proper remap?
1. What effect will it have on the DPF lifespan and regen frequency?
2. What effect will it have on the engine itself, if any (engine temperature, higher/lower wear due to higher/lower temperature of certain parts)?
3. Any other advantages/disadvantages (cleaner/dirtier oil, more/less turbo lag, etc.)?

Thank you.

[polar]

See you took my advice they are a bunch of clicky idiots on the Citroen forum nowadays - it was once great but these new moderators are just D*** - Lighty is the guy who can probably answer your questions accurately.

As you say the regs are totally different in your part of the world - o by the way there is one particular member on here who believes everything the government tells him. Apart from that im sure you will get some good advice.

Good luck in your quest.

[polar]

I have just found a reply to your post on the Citroen forum from the guy i was talking about "Lighty"

This is what he says:

"The dv6 engine does not like having the egr deleted & it will alter its running characteristics. Also on the C4, it is required to at least work electrically as the handbrake & esp functions work in conjunction with information from it.
1st sign of an egr fault on a C4 & the Auto handbrake stops functioning.
I would keep it working personally, we never delete on these cars."

[onix]

Yup, i saw it. I guess its better to just leave it as it is until i start having problems with it.

[brajomobil]

Yup, i saw it. I guess its better to just leave it as it is until i start having problems with it.

Don't worry you will have problems with it   

You can delete them both. You have to find professional remaper and they are gone for good.

Best regards,
brajomobil

[jj9]

Does a EGR blanking plate not work with this engine?. . . I know it works with the 16 valve version.

As the EGR system introduces spent exhaust gassed to the combustion process in an attempt to reduce the temperature due to lack of Oxygen, one can only assume that the burn will be less efficient and therefore more "Dirtier" so will produce moor soot (unburnt fuel).

So it follows that the DPF filter would stay less polluted if the EGR system was none functional.



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[polar]

Does a EGR blanking plate not work with this engine?. . . I know it works with the 16 valve version.

As the EGR system introduces spent exhaust gassed to the combustion process in an attempt to reduce the temperature due to lack of Oxygen, one can only assume that the burn will be less efficient and therefore more "Dirtier" so will produce moor soot (unburnt fuel).

So it follows that the DPF filter would stay less polluted if the EGR system was none functional.


You know JJ your logic is undeniable but im an old school retired diesel mechanic and these modern diesels never cease to amaze me in their illogical design!

It does sound a good idea at the expense of NOx, although NOx appears to be the governments latest witch hunt!  


Trust me when the technology exists to measure petrol particulates they will be found to be much more harmful than diesel ever was!!!!!!!!!!!!!!!!!   

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[jj9]

That's how it works,  and yes it would produce more NOx as the EGR system would be disabled.

Although the logic is sound, I don't think it would make that much difference to the soot in the DPF as the EGR system isn't in use constantly.


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[Hora]

The definitive answer is don't do it. Either the dpf or egr.

I won't swear but I don't see people who do this as nice. Hopefully one day the government will find a way to catch them and fine heavily.