John Deere 6930 EGR removal

Hereward · Oct 1, 2021

If I want to blank off the EGR how do I do it?

Blank it off with a plate where the exhaust gases enter the EGR cooler from the exhaust manifold?

Does it need blanking off anywhere else?

Could I remove the whole lot and blank off the exhaust manifold and remove the EGR cooler and blank off the coolant lines?

KB6930 · Oct 1, 2021

Our 79 has same engine it's been mapped off and it's egr is still in place just not used

Hereward · Oct 1, 2021

KB6930 said:
Our 79 has same engine it's been mapped off and it's egr is still in place just not used

So ECU software used to hold EGR valve closed?

KB6930 · Oct 1, 2021

I assume so .

It was done before we bought it only reason I noticed was because it's unplugged .

Derv doctor conversion back to a 20 series engine with standard turbo etc would be the direction I'd go if I had problems with it

Mark C · Oct 1, 2021

Derv Dr EGR delete remap and also a blanking plate. Will run a lot cooler and get rid of the over fuelling knock on startup

Hereward · Oct 1, 2021

Mark C said:
Derv Dr EGR delete remap and also a blanking plate. Will run a lot cooler and get rid of the over fuelling knock on startup

Where exactly does the blanking plate fit?

NZ Tech · Oct 1, 2021

You can't just blank it off it will overboost.

Hereward said:
If I want to blank off the EGR how do I do it?

Blank it off with a plate where the exhaust gases enter the EGR cooler from the exhaust manifold?

Does it need blanking off anywhere else?

Could I remove the whole lot and blank off the exhaust manifold and remove the EGR cooler and blank off the coolant line

Hereward · Oct 1, 2021

NZ Tech said:
You can't just blank it off it will overboost.

How do you mean? The Turbo will overboost?

BuskhillFarm · Oct 1, 2021

I got my 6140r egr mapped out by derv doctor. Was worried when tractor was running warm all the time when pulling. Now runs below half way. No blanking plate needed all software

NZ Tech · Oct 1, 2021

Software is designed to have the vgt turbo at a certain point and gas flow going thru the egr. Cap it off you will have more gas flow thru the turbo and vgt needs to be tuned to be at a different point so It won't overboost.

Don't just cap it off. Get it deleted from the software and it will be fine.

Hereward said:
How do you mean? The Turbo will overboost?

Timbo · Oct 1, 2021

Hereward said:
If I want to blank off the EGR how do I do it?

Blank it off with a plate where the exhaust gases enter the EGR cooler from the exhaust manifold?

Does it need blanking off anywhere else?

Could I remove the whole lot and blank off the exhaust manifold and remove the EGR cooler and blank off the coolant lines?

Yes, yes and yes. Coolant supply to the VGT needs to be re-routed (although some say they can be run dry without overheating)

You'll need the ECU properly flashed to remove the EGR function afterwards. Derv Dr will be your only man to do the job correctly here, as said, the vgt maps have to be altered to make it work correctly without egr.

Tomr10 · Oct 1, 2021

Timbo said:
Yes, yes and yes. Coolant supply to the VGT needs to be re-routed (although some say they can be run dry without overheating)

You'll need the ECU properly flashed to remove the EGR function afterwards. Derv Dr will be your only man to do the job correctly here, as said, the vgt maps have to be altered to make it work correctly without egr.

People say derv doctor is this one good person or a franchise

Timbo · Oct 1, 2021

Tomr10 said:
People say derv doctor is this one good person or a franchise

Person

Flat 10 · Oct 1, 2021

He must be a busy chap! Surely he isn’t the only chap clever enough to do it properly?

fieldfarmer · Oct 1, 2021

Flat 10 said:
He must be a busy chap! Surely he isn’t the only chap clever enough to do it properly?

He's done 3 different machines for me with no issues, he's the only one I would use.

BuskhillFarm · Oct 2, 2021

Flat 10 said:
He must be a busy chap! Surely he isn’t the only chap clever enough to do it properly?

Yes he’s busy and yes he is the only one who does it properly. There are 3 types of remappers
1:derv doctor who I’ve seen prof of him spending a day with a tractor on a dyno testing just to take a flat spot out.
2:middle of the road ones who’ll give you some power and smoke probably just buying maps of a franchise
3:some idiot who buys a laptop and some maps of a franchise dealer to make a quid not knowing what he’s at. Might even delete some software off the tractor to cock things up for you.

Timbo · Oct 2, 2021

BuskhillFarm said:
Yes he’s busy and yes he is the only one who does it properly. There are 3 types of remappers
1:derv doctor who I’ve seen prof of him spending a day with a tractor on a dyno testing just to take a flat spot out.
2:middle of the road ones who’ll give you some power and smoke probably just buying maps of a franchise
3:some idiot who buys a laptop and some maps of a franchise dealer to make a quid not knowing what he’s at. Might even delete some software off the tractor to cock things up for you.

Exactly this

Flat 10 · Oct 2, 2021

Timbo said:
Exactly this

Clearly a gap in the market for someone else to do a proper job then

NZ Tech · Oct 2, 2021

#3 arrive.. sometimes leave with the tractors ecu bricked or leave and the engine craps the bed or pto pack gets smoked due to them putting 200p on top. I've seen that on diff brands. Then they won't return to put it back to stock as they didn't keep the stock map

BuskhillFarm said:
Yes he’s busy and yes he is the only one who does it properly. There are 3 types of remappers
1:derv doctor who I’ve seen prof of him spending a day with a tractor on a dyno testing just to take a flat spot out.
2:middle of the road ones who’ll give you some power and smoke probably just buying maps of a franchise
3:some idiot who buys a laptop and some maps of a franchise dealer to make a quid not knowing what he’s at. Might even delete some software off the tractor to cock things up for you.

Timbo · Oct 2, 2021

NZ Tech said:
#3 arrive.. sometimes leave with the tractors ecu bricked or leave and the engine craps the bed or pto pack gets smoked due to them putting 200p on top. I've seen that on diff brands. Then they won't return to put it back to stock as they didn't keep the stock map

The concept of needing a battery maintainer during flashing is waay beyond the mentality for some "remappers" ..

John Deere 6930 EGR removal

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