Blanking EGR Valve

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Blanking EGR Valve

Decro

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There has recently been a number of posts about the legality of removing the insides of DPFs. Apart from the MOT failure risk the modification appears to represent an unacceptable modification for insurance purposes and increase pollutants.
Surely blanking the EGR valve represents another notifiable insurance modification.
I understand the idea of recirculating exhaust gases is to reduce emissions.

Just a thought.
 
I guess it would be, but since it is the automotive equivalent of eating your own poo you can see why it causes problems.
 
I guess it would be, but since it is the automotive equivalent of eating your own poo you can see why it causes problems.

Totally agree but whilst there is much talk about DPF removal there seems little comment about the "legality" of EGR blanking.
I also wonder if the crap that would have been recycled with an active EGR could cause extra DPF blockage if pushed straight through.
 
Totally agree but whilst there is much talk about DPF removal there seems little comment about the "legality" of EGR blanking.
I also wonder if the crap that would have been recycled with an active EGR could cause extra DPF blockage if pushed straight through.
Mmmm, touché it's a valid point.
 
my past 2 diesels 1.9jtd's i have blanked the EGR,and know many who have on other cars.
my two have always pasted the test leaving them blank. saves all the problems.

i have always believed give them a good blast/fuel clener etc before the test blow all the cr*p out and it should be ok.

"like eating your own poo":slayer: thats one way to put it!
 
Yeah, most of the diesels that we fail respond to that! A good run round the block in 1st & 2nd gear on the rev limiter leave some nice black stripes and a clean tailpipe.
 
Yes there has been much discussion about DPF removal since the recent MOT changes.

Regarding EGR blanking there are 3 consideration points:

1) Vehicle modification and insurance issues (no further comment)
2) If your engine ECU will complain if EGR is blanked unless you have the ECU recoded?
If the ECU measures EGR then the EML will come on and an EML is an MOT issue.
3) EGR affects NOx emission content ([ame]http://en.wikipedia.org/wiki/Exhaust_gas_recirculation[/ame]). The MOT test does not measure NOx. Requires specialist equipment.

There is a fourth item, namely one's green conscience.

On this latter point I have very mixed issues.

I bought a Euro 4 homologated diesel car (Croma) in 2005/6 that due to manufacturer early Euro 5 development came with DPF, enhanced EGR, etc etc. My car will pass all Euro 4 regs with no DPF and I'm fairly sure no, or MININIMAL EGR.

However the latest MOT regs will fail my Euro 4 homologated car just because it shipped with a DFP that was not required for it's Euro 4 rating but was fitted in early development ready for future required for Euro 5.

Don't forget your government ministers who dream up this crass ruling that Euro 4 cars with DPF have to comply with effectively Euro 5 DPF needed to meet Euro 5 regulations drive around in the latest cars funded by us tax payers.
 
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