Transitmania 12 @Santa Pod 15th to 17th May 2020


Bit of fun with MK7 EGR Valve

Transit Mk6 & Mk7 Forum. All Transits 2000 - 2013

Re: Bit of fun with MK7 EGR Valve

Postby rossco_pb » Thu Oct 24, 2019 7:37 am

Interesting the underwear sharing but a little bit off topic :-)
"there is always one..."

2009 2.4TD 140ps Duratorq, LWB dual rear wheel
2000 2.4TD 120ps Duratorq, LWB dual rear wheel - 3 tonne campervan
rossco_pb
Transit Aficionado
Transit Aficionado
 
Posts: 121
Joined: Mon May 21, 2012 8:58 am
Location: Mangawhai, New Zealand

Re: Bit of fun with MK7 EGR Valve

Postby andz327 » Thu Oct 24, 2019 9:13 am

Why so serious brother Ok ok so back on topic .....just fit a new egr and get on with your life man you've wasted enough time

ANDZ
User avatar
andz327
Transit Fanatic
Transit Fanatic
 
Posts: 3555
Joined: Thu Jan 14, 2016 3:44 am

Re: Bit of fun with MK7 EGR Valve

Postby Airthies » Thu Oct 24, 2019 10:00 am

Oh on the contrary dear andz boyo, if this man is willing to do some out the box thinking and tinkering then let it be, it may be the in roads to something more interesting, always nice to see some tinkering even though it may look like it's solving a problem that's been done before there's more than one way to skin a cat, and it can be satisfying to do things one's self.

Image

Sent from my A55ho11 using Crapatalk
Back now, well for a bit anyway.....
2008 350LWB 115PS ex welfare van
2008 350LWB 115PS ex fitters van + other things....
V86+patch
V86.04
X-Prog
C81
User avatar
Airthies
Transit Fanatic
Transit Fanatic
 
Posts: 4216
Joined: Fri May 03, 2013 10:10 pm
Location: Stirling, Scotland, & rest of the world

Re: Bit of fun with MK7 EGR Valve

Postby loot » Thu Oct 24, 2019 4:00 pm

I still maintain that everything that can be invented has been invented, it is timewasting folly i tell ya :P

https://rover.ebay.com/rover/0/0/0?mpre ... 3367973059
56 350 2.2 130ps mk7 with 2 side doors 8)
65 290 2.2 125ps custom with 2 side doors 8)
07 350 170ps
[img]http://[/img]
Ids v86 licence + v86.04 update + xprog here
Ids map here
User avatar
loot
Site Moderator
 
Posts: 29432
Joined: Sat May 05, 2012 6:06 pm
Location: North Wales

Re: Bit of fun with MK7 EGR Valve

Postby rossco_pb » Thu Oct 24, 2019 9:44 pm

loot wrote:I still maintain that everything that can be invented has been invented, it is timewasting folly i tell ya :P

https://rover.ebay.com/rover/0/0/0?mpre ... 3367973059


Hmmm maybe but I have a Mk7... as for why I persist, well why not. I have installed a brand new EGR and don't want exhaust gunge going into the engine, don't want a dash light on, don't want the pcm modified by deleting the EGR and hey, its technically a bit challenging so keeps the brain alive ;-)
"there is always one..."

2009 2.4TD 140ps Duratorq, LWB dual rear wheel
2000 2.4TD 120ps Duratorq, LWB dual rear wheel - 3 tonne campervan
rossco_pb
Transit Aficionado
Transit Aficionado
 
Posts: 121
Joined: Mon May 21, 2012 8:58 am
Location: Mangawhai, New Zealand

Re: Bit of fun with MK7 EGR Valve

Postby loot » Thu Oct 24, 2019 10:04 pm

rossco_pb wrote:
loot wrote:I still maintain that everything that can be invented has been invented, it is timewasting folly i tell ya :P

https://rover.ebay.com/rover/0/0/0?mpre ... 3367973059


Hmmm maybe but I have a Mk7... as for why I persist, well why not. I have installed a brand new EGR and don't want exhaust gunge going into the engine, don't want a dash light on, don't want the pcm modified by deleting the EGR and hey, its technically a bit challenging so keeps the brain alive ;-)

Indeed 8)

Measure the output of the maf and it'll give a resistance, then get a potentiometer that will allow the current output range but will increase or decrease the output but not much.

So say for argument sake the maf range is 10k min to 100k max then you can lower it by 10% or raise it by 10%.
The maf works on wind, the more wind blowing over the hot element the cooler it gets and that changes the resistance, it has to account for different outside temps and so on.

I don't think it is that clever so maybe get it to run warmer and you'll not see the eml. The turbo does 100% of the work when the egr is blanked and that means more air flow over the maf and cooler the element and different resistance.

Possible issue with vnt feedback but the mk8 all have vnt.

You may get away with just slight change in the maf but you may not and may need to counter the egr motor demand because the egr isn't commanded uniformly, it may not work until the engine is upto temp and it may not work at 'WOT'.

Anyway, good stuff for having a play :P

Ps. I know yours is mk7 and there was a thread on the forum and ebay selling them but I can't find it, and I also think you know what I've said above but it's good to talk a the great Bob Hoskins used to say.
56 350 2.2 130ps mk7 with 2 side doors 8)
65 290 2.2 125ps custom with 2 side doors 8)
07 350 170ps
[img]http://[/img]
Ids v86 licence + v86.04 update + xprog here
Ids map here
User avatar
loot
Site Moderator
 
Posts: 29432
Joined: Sat May 05, 2012 6:06 pm
Location: North Wales

Re: Bit of fun with MK7 EGR Valve

Postby rossco_pb » Thu Oct 24, 2019 10:37 pm

loot wrote:
Measure the output of the maf and it'll give a resistance, then get a potentiometer that will allow the current output range but will increase or decrease the output but not much.



The Mk7 MAF outputs a variable voltage from the thermistor for temperature, ie resistance varies relative to temperature but the air mass output is a variable frequency that is in direct proportion to the air flow so at say 750rpm (idle) frequency is about 4700hz with EGR closed but as EGR is actually open when at idle the frequency is slightly lower and so it goes up through the revs with and without the variable of additional air flow when turbo in boost. Quite interesting really but I think it is a pretty coarse measurement in ECU - well hoping that the case anyways. I assume the device you mentioned messes with the air temp value and as such fools the ECU that way, ie air mass is relative to air temp as the colder the air the denser and therefore more mass so by telling the ECU air temp is higher than it really is it does not realise more air is actually going into the engine.
"there is always one..."

2009 2.4TD 140ps Duratorq, LWB dual rear wheel
2000 2.4TD 120ps Duratorq, LWB dual rear wheel - 3 tonne campervan
rossco_pb
Transit Aficionado
Transit Aficionado
 
Posts: 121
Joined: Mon May 21, 2012 8:58 am
Location: Mangawhai, New Zealand

Re: Bit of fun with MK7 EGR Valve

Postby loot » Thu Oct 24, 2019 10:47 pm

I haven't done any real world measuring, I think the voltage is 5 v that is used.
The amount of air flowing over the maf is measured by feedback so I'm proposing that changing it just enough to put it back into range should stop the melchior on.
As it is the dtc is maf in range but higher than expected. So let's lower it to expected :lol:

I did add some leds to the 2 egr motor pins to see if and when the motor is commanded to open the egr and they just sort of flashed when I revved.

Not very scientific tbh :lol:

I bought an egr from tpuk for 65 quid and it was the later black one listed as upgraded. And I cleaned my inkjet manifold out, this put an end to my egr fun really as for all the hassle I actually saw better results on my 2.4 140ps vnt system.

Bloody ford. :D
56 350 2.2 130ps mk7 with 2 side doors 8)
65 290 2.2 125ps custom with 2 side doors 8)
07 350 170ps
[img]http://[/img]
Ids v86 licence + v86.04 update + xprog here
Ids map here
User avatar
loot
Site Moderator
 
Posts: 29432
Joined: Sat May 05, 2012 6:06 pm
Location: North Wales

Re: Bit of fun with MK7 EGR Valve

Postby rossco_pb » Fri Oct 25, 2019 1:24 am

Yep the EGR on the 140ps don't seem to last long, mine only around 65,000km but is a heavy camper so moving a lot of fuel and resultant carbon etc through the works. Be interesting to see how long one lasts that does not have exhaust going through it - ie just the movement of the valve...
"there is always one..."

2009 2.4TD 140ps Duratorq, LWB dual rear wheel
2000 2.4TD 120ps Duratorq, LWB dual rear wheel - 3 tonne campervan
rossco_pb
Transit Aficionado
Transit Aficionado
 
Posts: 121
Joined: Mon May 21, 2012 8:58 am
Location: Mangawhai, New Zealand

Re: Bit of fun with MK7 EGR Valve

Postby rossco_pb » Tue Dec 03, 2019 3:01 am

Little update on this now that I have managed to test this latest mod over some distance. Initially had another P1103 MAF reading high so tweaked the frequency reduction a bit more and has not shown up again and been about 400km so may have it sorted but will see how it goes with varying air temps etc.
"there is always one..."

2009 2.4TD 140ps Duratorq, LWB dual rear wheel
2000 2.4TD 120ps Duratorq, LWB dual rear wheel - 3 tonne campervan
rossco_pb
Transit Aficionado
Transit Aficionado
 
Posts: 121
Joined: Mon May 21, 2012 8:58 am
Location: Mangawhai, New Zealand

Previous

Return to Mk6 & Mk7 - Third Generation Transits



Who is online

Users browsing this forum: No registered users

croncroncron