b230fk egr valve

B14, B172, B19/200, D16 engine, ignition, cooling, fuel & exhaust system, gearbox, variomatic, final drive... | Tuning: engine swaps, welded diff, clutch upgrades...
NO parts requests here, please use our V3M BUY & SELL corner
Post Reply
wiganer31
Posts: 479
Joined: 14 Feb 2011 03:22 am

b230fk egr valve

Post by wiganer31 » 09 Aug 2012 03:19 am

hi guys ive been searching around for info but cant find much and dont get half of what i have read :lol:
ive been thinking about removeing/blanking the egr valve on my b230fk powered 360 but have a few questions, the only thing that i know about doing it is that it free's up a few ponies, is that correct?
why do people remove the egr valve?
what benefits dose it offer?
are there any down falls to taking it off? dose it cause any issues etc/

sorry if its silly but you only learn by asking,

and why im here anyone got any picks of one blocked of or pics of what needs removing/blancking off? or a guide that i couldnt find?


cheers guys

User avatar
Chris_C
*** V3M DONOR ***
Posts: 9600
Joined: 18 Jun 2004 11:53 pm
Location: South Coast, UK

Re: b230fk egr valve

Post by Chris_C » 09 Aug 2012 09:13 am

I have no idea about the 900 setup, only what the Vauxhall people do to the engine in my corset.

EGR's are there to make emmisions look better, as such they are a pain in the backside. However... removing them on mine makes the ECU upset (I'm guessing because the lambda is wrong to what it's expecting to happen). So, whilst the theory is that is frees up power, it really wouldn't surprise me if the ECU read a fault and triggered some way of retarding the engine overall. Hence, mine just got cleaned up rather than removed. Plus, whilst it likely doesn't affect you, now the MOT covers engine warning lamps (which would be triggered), it wasn't worth it for me.
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

Evoman
Posts: 1688
Joined: 15 Sep 2010 10:47 pm
Location: Mid Wales

Re: b230fk egr valve

Post by Evoman » 09 Aug 2012 08:35 pm

I know on alot of modern cars its pointless because the engine management fully closes the egr on full throttle, however im not sure on earlier egr valves. I would agree with chris that it will upset the lamda etc. The egr opens to allow the engine to warm up abit fast, no a deisel it helps prevent NOX, not sure on a petrol though
Image

User avatar
Chris_C
*** V3M DONOR ***
Posts: 9600
Joined: 18 Jun 2004 11:53 pm
Location: South Coast, UK

Re: b230fk egr valve

Post by Chris_C » 10 Aug 2012 10:42 am

The obvious solution is to work out where the code is for EGR rubbish and reprogram it ;)
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

zombeh
Posts: 14
Joined: 06 Apr 2010 10:21 pm

Re: b230fk egr valve

Post by zombeh » 10 Aug 2012 07:23 pm

The other thing a (modern) EGR on a petrol doe aside from reducing NOx emissions is to reduce pumping losses at low throttle openings. It is generally a good thing unless you don't care about fuel economy, at least until it gets so full of soot it doesn't work any more.

wiganer31
Posts: 479
Joined: 14 Feb 2011 03:22 am

Re: b230fk egr valve

Post by wiganer31 » 10 Aug 2012 07:32 pm

some stuff to get my head around there lol, cheers guys, not fussed about fuel economy on this one lol, wouldnt want it causeing any problems though

gl340
Posts: 25
Joined: 22 Oct 2011 10:24 pm
Location: Serbia

Re: b230fk egr valve

Post by gl340 » 12 Aug 2012 05:29 pm

EGR is drived from igniton ECU, lambda sond have nothing with it.
It is used only on 1995-1996 m/y B230FK engine and is made by Pierburg.
There is no single Watt gain from removing it but there is loss in perfomance when EGR is not working properly as ignition ECU puts engine in sleep mode (mode for just crawling to service).

EGR is first activated at engine temperature of 61C, when starts to pulse and check exhaust gases temperature.
If during check there is detected flow of exhaust gases through EGR ECU is happy and all is ok.
If no gas flow, ie exhaust gas temperature measured is all the time same, ECU fires limp home mode and lit up check engine lamp with 2-4-1 igniton ECU code fault.

Volvo removed EGR from 1997 m/y as gases are clean enough just with different ECU programming.

On B230 FK to remove or stop EGR you need to exchange ignition EEPROM in order to prevent limp home mode, or somehow dig inside Bosch software and find way how to reprogram original firmware inside EZK.

In pacakge with EGR Volvo used 2 types of EGR temperature sensor, PTC or NTC resistor. They have different mounting position, PTC is separate from EGR valve up on the tube.
NTC is integral to the side of EGR valve.

I do not know if firmware inside ECU is different for PTC or NTC sensor.

My 1995 940 B230FK has NTC type and I have 2 times repaired EGR valve (torn vacuum membrane).

After last reparation with glueing membrane it is working ok now for more then year.
New one from Pierburg as OEM is AFAIK around 350 euros.
At local Volvo dealer the price was suggested, around 1000-1200 euros, so I take a chance to repair myself.

That is what I know about EGR in b230fk.
1995 945SE AW71L bifuel 205k km
1987 340GL M47 II LPG 208 km
and still rolling

User avatar
Chris_C
*** V3M DONOR ***
Posts: 9600
Joined: 18 Jun 2004 11:53 pm
Location: South Coast, UK

Re: b230fk egr valve

Post by Chris_C » 12 Aug 2012 08:05 pm

Awesome post, that helps me with some thoughts on how things work on my engine too, thank you.
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

wiganer31
Posts: 479
Joined: 14 Feb 2011 03:22 am

Re: b230fk egr valve

Post by wiganer31 » 13 Aug 2012 12:36 am

gl340 wrote:EGR is drived from igniton ECU, lambda sond have nothing with it.
It is used only on 1995-1996 m/y B230FK engine and is made by Pierburg.
There is no single Watt gain from removing it but there is loss in perfomance when EGR is not working properly as ignition ECU puts engine in sleep mode (mode for just crawling to service).

EGR is first activated at engine temperature of 61C, when starts to pulse and check exhaust gases temperature.
If during check there is detected flow of exhaust gases through EGR ECU is happy and all is ok.
If no gas flow, ie exhaust gas temperature measured is all the time same, ECU fires limp home mode and lit up check engine lamp with 2-4-1 igniton ECU code fault.

Volvo removed EGR from 1997 m/y as gases are clean enough just with different ECU programming.

On B230 FK to remove or stop EGR you need to exchange ignition EEPROM in order to prevent limp home mode, or somehow dig inside Bosch software and find way how to reprogram original firmware inside EZK.

In pacakge with EGR Volvo used 2 types of EGR temperature sensor, PTC or NTC resistor. They have different mounting position, PTC is separate from EGR valve up on the tube.
NTC is integral to the side of EGR valve.

I do not know if firmware inside ECU is different for PTC or NTC sensor.

My 1995 940 B230FK has NTC type and I have 2 times repaired EGR valve (torn vacuum membrane).

After last reparation with glueing membrane it is working ok now for more then year.
New one from Pierburg as OEM is AFAIK around 350 euros.
At local Volvo dealer the price was suggested, around 1000-1200 euros, so I take a chance to repair myself.

That is what I know about EGR in b230fk.


nice one mate some good info there, looks like its staying



cheers

Ride_on
Posts: 2265
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: b230fk egr valve

Post by Ride_on » 14 Aug 2012 01:54 am

There are definately different EZK modules with and without/EGR. Turbo bricks seem to be on top of it, I would try there. Karl is the electronics expert and designed the EZK mod for DIS. Might even be PCB stuffing options.

My 96 B230FT doesn't have it, nor did the 98 B230FK auto I just got for my sis.
My 1995 B230FT does have it.

Just got back into my 1995 car after driving the auto for a week, it is awesome.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

Post Reply