What are the advantages/disadvantages disconnecting EGR?
I heard that can be longer until car gets warm? It is imortant for cold winters (average temp in winter is -5 °C but sometimes can be even up to -30 °C).
The benefits of egr on Diesel engines starts to drop away around 30,000 miles and as gone by 50,000 miles
There is a trade off between nox and particular matter The egr always increases particular matter and in that it will not reduce nox On the A2 due to mileage I see no point in it on the A2
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So am I correct in stating that if one was to remove and blank off the tube would there be any sort of warning light appear on the dash?
Use of EGR creates more particles; thats why they added DPF on later cars. With DPF comes regeneration, and that uses additional fuel (i.e even more Co2, NOx, particles etc) but also contaminate your engine oil. So the whole thing is quite stupid.
Certainly not true for NOx since the whole point of EGR is to reduce it. Disabling EGR for road use is illegal as your vehicle won't meet its emission requirements.
RAB
Certainly not true for NOx since the whole point of EGR is to reduce it. Disabling EGR for road use is illegal as your vehicle won't meet its emission requirements.
RAB
On later cars, Euro4L, they added DPF to stop the particles. But the DPF needs to be regenerated regularly to avoid getting clogged. Regeneration uses additional fuel which again is bad (also pollutes) and in addition some of the fuel (post-injection) also ends up in the oil sump. Diesel in your engine oil is no good. On Euro5 and 6 they added SCR/Adblue but this also need maintenance, and people seem to focus only on the mpg but forgetting the money spent to top up the adblue tank.