Has anyone tried this on their N57, adjusting the EGR fresh air ratio?

Len_Beach · 01-01-2018, 03:20 AM

I'm intrigued as to whether this will work on the 30/35d as it did on my E90.

http://www.e90post.com/forums/showthread.php?t=1296190

Sullym6 · 02-26-2018, 06:54 AM

Is there a guide on how to do this?

Len_Beach · 02-28-2018, 10:55 AM

Quote:

Originally Posted by Sullym6

Is there a guide on how to do this?

There's a rough guide at the bottom of the link below.

What model do you have?

http://www.bimmerfest.com/forums/sho.../topics/835572

Sullym6 · 02-28-2018, 01:49 PM

Quote:

Originally Posted by Len_Beach

Quote:

Originally Posted by Sullym6

Is there a guide on how to do this?

There's a rough guide at the bottom of the link below.

What model do you have?

http://www.bimmerfest.com/forums/sho.../topics/835572

Thanks len

I have 2014 335d, did this on my previous vag cars and always felt a decent improvement
Will report back once I have had a play

Sully

Len_Beach · 02-28-2018, 03:48 PM

Quote:

Originally Posted by Sullym6

Quote:

Originally Posted by Len_Beach

Quote:

Originally Posted by Sullym6

Is there a guide on how to do this?

There's a rough guide at the bottom of the link below.

What model do you have?

http://www.bimmerfest.com/forums/sho.../topics/835572

Thanks len

I have 2014 335d, did this on my previous vag cars and always felt a decent improvement
Will report back once I have had a play

Sully

Good man

Sullym6 · 03-02-2018, 03:51 PM

Thought I would have a go tonight and there is no egr adjustments option under service functions. Any tips welcome

Sullym6 · 03-06-2018, 03:52 PM

I have just tried with ista 4.09 and still I do t see egr adjustment under service functions.
Does anyone have any ideas as just spent 2 evenings download and setting up a newer version of ista only to find the same issue

Len_Beach · 12-08-2018, 05:07 AM

Was there any progress with this?

This made a positive difference to my 330d so keen to do the same on my 435d.

Watsey · 12-08-2018, 12:23 PM

I had the EGR coded fully closed as part of the remap. The engine (30d) is more responsive, revs smoother, has less diesel rattle, and fuel economy improved by around 4mpg.

I appreciate the case for EGR but the effects on driveability and fuel economy outweigh that IMO.

Enabled · 12-08-2018, 01:02 PM

If you had a remap, you can't simply associate EGR closure with all those effects. Remaps change a lot of things, depending on the skill of the tuner.

Leaving everything else stock, EGR operational will get better fuel efficiency, as long as intake is clear. EGR off alone with no other changes will get worse fuel mileage.

Len_Beach · 12-08-2018, 05:51 PM

Quote:

Originally Posted by Enabled

If you had a remap, you can't simply associate EGR closure with all those effects. Remaps change a lot of things, depending on the skill of the tuner.

Leaving everything else stock, EGR operational will get better fuel efficiency, as long as intake is clear. EGR off alone with no other changes will get worse fuel mileage.

I was the original poster of that thread and I saw around 4mpg improvement on my E90 330d N57 by reducing the EGR opening.

Enabled · 12-09-2018, 11:06 AM

That's really interesting, because when turned off from tune (on 328d) the results are different. There is more turbo compensation, which results in the turbo "blocking" free exhaust flow. Of course there are many different ways to turn it off in the tune as well.

If I remember correctly, the newer ISTAs removed that feature, since all the emissions scandals.
Tool32 should still be able to do it still.

01-01-2018, 03:20 AM	#1
Len_Beach Major 186 Rep 1,247 Posts Drives: 435d Join Date: Jun 2011 Location: UK iTrader: (1)	Has anyone tried this on their N57, adjusting the EGR fresh air ratio? I'm intrigued as to whether this will work on the 30/35d as it did on my E90. http://www.e90post.com/forums/showthread.php?t=1296190
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02-26-2018, 06:54 AM	#2
Sullym6 Lieutenant 133 Rep 570 Posts Drives: Not got it yet Join Date: Aug 2016 Location: Manchester iTrader: (1)	Is there a guide on how to do this?
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03-02-2018, 03:51 PM	#6
Sullym6 Lieutenant 133 Rep 570 Posts Drives: Not got it yet Join Date: Aug 2016 Location: Manchester iTrader: (1)	Thought I would have a go tonight and there is no egr adjustments option under service functions. Any tips welcome Attached Images
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03-06-2018, 03:52 PM	#7
Sullym6 Lieutenant 133 Rep 570 Posts Drives: Not got it yet Join Date: Aug 2016 Location: Manchester iTrader: (1)	I have just tried with ista 4.09 and still I do t see egr adjustment under service functions. Does anyone have any ideas as just spent 2 evenings download and setting up a newer version of ista only to find the same issue
	Appreciate 0 Quote

12-08-2018, 05:07 AM	#8
Len_Beach Major 186 Rep 1,247 Posts Drives: 435d Join Date: Jun 2011 Location: UK iTrader: (1)	Was there any progress with this? This made a positive difference to my 330d so keen to do the same on my 435d.
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12-08-2018, 12:23 PM	#9
Watsey Major General 6399 Rep 8,489 Posts Drives: F31 330D sDrive M Sport Join Date: Jun 2015 Location: On sabbatical. iTrader: (1)	I had the EGR coded fully closed as part of the remap. The engine (30d) is more responsive, revs smoother, has less diesel rattle, and fuel economy improved by around 4mpg. I appreciate the case for EGR but the effects on driveability and fuel economy outweigh that IMO. __________________ Current : F31 330sD, remapped, Ohlins Road & Track, Millway camber plates, Quaife LSD, Stoptech brakes + Pagid RSL1 pads all round, Weichers front strut brace, Eibach front & rear anti-roll bars, Michelin MP4S.
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12-08-2018, 01:02 PM	#10
Enabled Lieutenant Colonel 1406 Rep 1,797 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	If you had a remap, you can't simply associate EGR closure with all those effects. Remaps change a lot of things, depending on the skill of the tuner. Leaving everything else stock, EGR operational will get better fuel efficiency, as long as intake is clear. EGR off alone with no other changes will get worse fuel mileage. __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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12-09-2018, 11:06 AM	#12
Enabled Lieutenant Colonel 1406 Rep 1,797 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	That's really interesting, because when turned off from tune (on 328d) the results are different. There is more turbo compensation, which results in the turbo "blocking" free exhaust flow. Of course there are many different ways to turn it off in the tune as well. If I remember correctly, the newer ISTAs removed that feature, since all the emissions scandals. Tool32 should still be able to do it still. __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe. Last edited by Enabled; 12-09-2018 at 11:12 AM..
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