New Turbo .....egr Valve

[muppetofdoom]

Hi, i've just had to have a new turbo fitted to my dear old '98 1.9 tdi galaxy and i'm now wondering what to do... this is where i need your help please people.

 

1. i'm sure a while back in an effort to reduce smoke from the exhaust a mechanic told me he had disabled the egr valve, there seems to be a difference of opinion on this being a good or bad thing ?, please help and tell me if it needs enabling or not ?

 

2. Please checkout the following link and tell me if you think it seems like a good thing or not ?

 

http://www.egrvalve.co.uk/index.php?page=products

 

 

cheers peeps, i await your usuall help as ever,

[seatkid]

Quite frankly, If I had a major expensive failure on a 98 car, I would be straight off down to a dealer negotiating a scrappage deal.

 

Pot luck if this company is any good or claims are valid.

 

Their bits look shiny......

 

Personally I would always aim to repair things back to original state using OEM parts if I can afford it.

[Richard gal]

Hi, i've just had to have a new turbo fitted to my dear old '98 1.9 tdi galaxy and i'm now wondering what to do... this is where i need your help please people.

 

1. i'm sure a while back in an effort to reduce smoke from the exhaust a mechanic told me he had disabled the egr valve, there seems to be a difference of opinion on this being a good or bad thing ?, please help and tell me if it needs enabling or not ?

 

2. Please checkout the following link and tell me if you think it seems like a good thing or not ?

 

http://www.egrvalve.co.uk/index.php?page=products

 

 

cheers peeps, i await your usuall help as ever,

 

Mine is running without the egr working though still fitted,IE capped off and pipe blocked, it seems to be a little more economical on fuel (got to 500 miles before warning light for the first time a few weeks ago), it feels it may have more power but cant be certain on this.

 

I did this after a Turbo replacement due to exhaust vane coming off, and after being advised to replace the EGR at the same time i had a look and it was 50% clogged!

 

It will also pass the MOT easier, as they dont test NO2 which is what a EGR reduces

Edited June 9, 2009 by Richard gal

[muppetofdoom]

okidoki, the scrappage deals great if you have the cash for a shiney new car i guess, but that's not me unfortunately, unless wednesdays lottery's a winner ! thanks for the help/info though

[Scorpiorefugee]

I've just ordered one of those thingies 'cos my EGR appears to be leaking exhaust gas and is US so, if you want to wait while I assess it I'll post a report in a week or so.

 

From what I can gather thes things are marketed to those looking for enhanced performance and I have found a couple of reports of improved low speed performance.

Edited June 9, 2009 by Scorpiorefugee

[srafferty]

I replaced my EGR with an original recently.

 

Old one had a fractured lug and had to be bypassed.

 

Economy? little different.

 

Smoke? Lot less now.

 

Noise Much quieter now.

 

The part you are looking at is a bypass.

 

I prefer my clean quiet car! <_<

[muppetofdoom]

I've just ordered one of those thingies 'cos my EGR appears to be leaking exhaust gas and is US so, if you want to wait while I assess it I'll post a report in a week or so.

 

From what I can gather thes things are marketed to those looking for enhanced performance and I have found a couple of reports of improved low speed performance.

 

 

cheers, will wait to see what you think then, greatly appreciated by the way !

[Willie Krashitt]

Mr Rafferty has made an important point.

 

From an engineering perspective.

 

Many people believe (wrongly) that the EGR valve is only used for emissions(NOx) reduction, but this is not the case. A very useful by product of slowing the combustion burn rate down is that the engine becomes much quieter, especially at low speed/low load and at idle (and the PD engine needs every bit of help it can get in this area).

The other thing the EGR valve is used for is to regulate the boost pressure in conjunction with the wastegate/vanes to give the correct airflow through the engine during part load operation - Boost control will be in 'open loop' control, ie wastegate/vane position determined by a map, and the EGR valve will open and close to regulate the boost pressure. Only at higher speeds/high loads (when EGR is off) will the boost pressure go into 'closed loop' control, where the w/g or vanes will move to regulate the boost.

 

Having said this, I am sure many people will find that fitting a straight forward bypass will demonstrate a big improvement over an old sticking EGR valve, and will report that it is much better than before, but the car would be even better if a new EGR valve were to be used.

 

George.

[Richard gal]

Mr Rafferty has made an important point.

 

From an engineering perspective.

 

Many people believe (wrongly) that the EGR valve is only used for emissions(NOx) reduction, but this is not the case. A very useful by product of slowing the combustion burn rate down is that the engine becomes much quieter, especially at low speed/low load and at idle (and the PD engine needs every bit of help it can get in this area).

The other thing the EGR valve is used for is to regulate the boost pressure in conjunction with the wastegate/vanes to give the correct airflow through the engine during part load operation - Boost control will be in 'open loop' control, ie wastegate/vane position determined by a map, and the EGR valve will open and close to regulate the boost pressure. Only at higher speeds/high loads (when EGR is off) will the boost pressure go into 'closed loop' control, where the w/g or vanes will move to regulate the boost.

 

Having said this, I am sure many people will find that fitting a straight forward bypass will demonstrate a big improvement over an old sticking EGR valve, and will report that it is much better than before, but the car would be even better if a new EGR valve were to be used.

 

George.

 

I take on board your points but fuel cannot be burnt properly with exhaust fumes, clean air is better, as in engines pre EGR.

I hate this burning extra fuel to clean up emissions idea, agricultural tractors fuel economy has been decimated by this law.

The emissions may be cleaner but the CO2 output is higher.