Technical Blanking EGR Valve

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Technical Blanking EGR Valve

alistairr

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I recently cleaned the EGR valve on my 1.9 Multijet 150 after I noticed it left a puff of smoke when accelerating from standstill. There was no improvement in performance - it was going well beforehand anyway - and it still gives the occasional puff of smoke when accelerating away. I was thinking of blanking the EGR valve but don't want the hassle of an engine warning light so I'm looking at using the plates with holes in them, like these:

http://www.ebay.co.uk/itm/EGR-valve-blanking-plate-VAUXHALL-CDTi-FIAT-ALFA-1-9-2-4-JTD-JTDM-SAAB-1-9-CDTI-/110902313955?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item19d24b03e3

http://www.ebay.co.uk/itm/EGR-valve-blanking-block-off-plate-FIAT-ALFA-1-9-JTDM-VAUXHALL-OPEL-1-9-CDTI-16V-/180947852254?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2a21551bde

Is it advisable to use both exhaust and inlet blanking plates, or is one enough? If so, which one is better? I see that Fiat have a gasket no. 55225287 that seems to do the same as the above inlet blanking plate.

Any comments gratefully received.

Many thanks.

Alistair

 
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What makes you think a puff of smoke when pulling off means its the egr valve thats faulty? It could be down to so many things and if the performance seems ok, why not wait and see?
 
As said time and time again you will need to re-map your ecu to 'delete' the EGR valve so it doesn't use it. If you just blank it off you will get an engine warning light come on and could cause adverse effects to your engine with the fuel/air mixtures etc.

Edit:

I have just looked at the links and have realised you are wanting to restrict the EGR rather than 'blank' it completely off so ignore my comments above unless you do want to completely 'blank' it off.
 
Last edited:
As said time and time again you will need to re-map your ecu to 'delete' the EGR valve so it doesn't use it. If you just blank it off you will get an engine warning light come on and could cause adverse effects to your engine with the fuel/air mixtures etc.

Edit:

I have just looked at the links and have realised you are wanting to restrict the EGR rather than 'blank' it completely off so ignore my comments above unless you do want to completely 'blank' it off.

?? What adverse effects ? If you dont remap and merely blank the egr valve? Has the FIat diesel been designed differently to how it was 5 year's ago? Otherwise I do not see any reason why one has to remap a blanked of Egr valve for the reason of adverse effect..
 
If you don't "delete" the EGR by a re-map, the ECU detects excess pressure between exhause & inlet, says, "Oh dear, the EGR valve is stuck" and puts the engine management light on. I'd say that was an adverse effect!
 
Firstly, re the two restrictor plates. You only need to blank/restrict at ONE location.

I've no experience of using the smaller oval plate.

I've used the large square (with 4 holes plate). Note plate you show on your link is an earlier plate and this will have to be fitted with TWO of the usual soft metal "crush" gaskets OR with another gasket sealant.

IMHO the better gasket to Fiat is Fiat Part No:55225287

This comes with integral surface bonded silicon seal on both sides and is cheaper than the plain one (71751468)

Regarding changes in engine design then no real change has be made to the basic mechanical of the engine block and head.

What has changed is that the later 150 engine has a completely different ECU programming and the ECU indirectly monitors EGR flow via changes in measure air flow. The earlier ECUs did not do this so one could fully blank the EGR without problems.

The restrictor plates attempt to reduce EGR but not eliminate it.

I have the Fiat 4 hole plate installed on my Croma 150 and have had no issues or warring lights.

It could be that a plate with less holes will also work but there will come a point where the flow is restricted too much and the errors will occur.

If you fancy playing around then you could make and drill your own large square gasket, or buy the older 4 holed gasket without the integral seal (these are use once only) and use high temperature foil tape to blank off 2 or 3 holes and see if you can get away with just the one hole.

Personally I would just fit the Fiat (55225287) part and forget.
 
If you don't "delete" the EGR by a re-map, the ECU detects excess pressure between exhause & inlet, says, "Oh dear, the EGR valve is stuck" and puts the engine management light on. I'd say that was an adverse effect!

does it make the car go into limp home mode? if it does then agreed if it doesn't then no, that's not an adverse effect.as no adverse condition is produced ie the running of the car is not adversely effected or likelihood of damage.
 
does it make the car go into limp home mode? if it does then agreed if it doesn't then no, that's not an adverse effect.as no adverse condition is produced ie the running of the car is not adversely effected or likelihood of damage.

I'm not sure about going into limp mode, but I suspect it does. Also, I've heard its an MOT fail if the Engine Management light is on.
 
does it make the car go into limp home mode? if it does then agreed if it doesn't then no, that's not an adverse effect.as no adverse condition is produced ie the running of the car is not adversely effected or likelihood of damage.

The engine management light will come on if you blank off the EGR of a JTD 16v, this is an instant MOT fail, I'd call that an adverse effect. ;)

However, a restrictor plate can be fitted with no adverse effects. (y)
 
Many thanks to all who replied, particularly S130 who gave me the answers I was seeking. Re ban1111's comments, I cleaned the EGR valve as it was the easiest thing to do, and worth a try. I then heard about the blanking plates and thought that fitting them may eliminate the need to clean the EGR valve in future. If it had cured the smoking I would have been pleased, but so little smoke is emitted that I'm not really bothered by it. I suppose the versions of blanking plates with holes aren't really "blanking" plates but that's what they seem to be called.

Alistair
 
To add a little extra clarification about EGR and DPF modifications.

Currently under UK VOSA MOT test criteria you can mess/change/delete/remove EGR and DPF systems.

With most post 2005 Fiat diesel engines (especially the 16V units) then messing with EGR or DPF systems will eventually throw a MIL/Error light on the dash. The only way to avoid the MIL/Error is to have the engine ECU remapped to remove those functions. As far as VOSA/MOT there is no issue here. HOWEVER there are insurance issues if you do not disclose and get covered for these changes by your insurance company.

With regards to EGR restriction with a pucker Fiat part then I do not consider this an engine modification and not an insurance issue.
 
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