Disabling EGR

[W210VIP]

Doubt very much that would happen. He is a very helpful guy on the forum.

Have contacted Alexander through here. Thanks Oigle

 

[Naraic]

Which delete? Shiny or map?

Huh?

 

[W210VIP]

Huh?

Shunt rather

 

[alexanderfoti]

Feel free to call me any time, may be easier to get on the same page than going back/forth with PM's

 

[W210VIP]

Feel free to call me any time, may be easier to get on the same page than going back/forth with PM's

Appreciate all the help Alexander

 

[W210VIP]

Update:

Shunt has been fitted with no faults relating to it.

However I’m still having intermittent boost issues. I suppose the egr may be partially open.

 

[oigle]

If you have successfully fitted the shunt, the egr piston will not move so cannot be intermittent. Suggest problem will be elsewhere.

 

[HamV6]

Hi All,

Thanks for this thread, it could prove to be great for me if someone can confirm if this works on a V6 W639 motor?

Thanks

 

[drsayman]

Hello, I'm new here. Excuse me for foolish question, but can I use 1N4007 instead of 4004 because I have it?

 

[drsayman]

Thank you dieselman and others for the thread!
Work like a charm on my E200 CDI facelift W210 2001 were:
MAF Pin 24 ECU plug 3
EGR signal Pin 50 ECU plug 2
12 volt supply Pin 37 ECU plug 2
Thank you one more time!

 

[kid-jensen]

Drsayman, Yes you can use an IN4007, it's the same but with a higher voltage tolerance...

 

[max_70]

hello it's possible disable egr my B180 CDI W245 ?
thanks

 

[M80]

hello it's possible disable egr my B180 CDI W245 ?
thanks

Thanks for letting us know.

 

[Tony Dyson]

Thanks for letting us know.

I genuinely, very nearly PMSL...

 

[Siver benz]

Hi all , I am currently trying this MOD on my 01 E220CDI , I believe I have followed the instructions properly but I'm not getting the desired result, car is still going to limp mode but also revving by itself , any help would be greatly appreciated as I'm beginning to loose the plot with it

Hi. Iam currently thinking of installig the bypas. We have the same car. I just need assistance regarding ecu plug identification and pin identification. I can not identify the maf wire because i dont know were to start counting the ecu plug . Do i start from near the engine side ?

 

[Siver benz]

In general it's felt that having the EGR (exhaust gas recirculation) system on diesel engines is good for reducing the NOX output but bad in all other respects.
It reduces economy, creates more smoke, increases problems and maintenance requirements due to clogging the intake and can reduce overall engine life.
As a result of wanting greater economy I decided to stop the exhaust gas being recirculated. The problem with doing this on a modern engine is that the EGR valve operation is monitored by the MAF sensor.
The only way to disable the EGR and not trip a fault code and limp home mode is to fool the MAF into thinking the EGR is still working.

On another forum I saw a member Karteck was also looking into this and performing some testing on what resistance values to use to create the required drop in MAF output when the MAF should be operating. He provided the below circuit to use.

The basic circuit for this comprises of two resistors to act as a potential divider and a diode to stop 12v being fed into the MAF circuit.

By connecting into the EGR vacuum transducer activation wire this causes the circuit to only operate when the transducer should be operating the EGR valve.

The standard circuit is a 1k ohm resistor, a 470 ohm resistor and a diode. 1/4 Watt resistors work OK.

The above is for a W210 300TD but the same components should suffice for most applications, but the connections will need to be determined.

First locate the EGR vacuum transducer and disconnect the wiring plug. Using a meter check which wire is the 12v feed and which is the active low signal wire.

Next go to the MAF sensor and again using the meter source the signal wire, which should be Pin5.

For ease of connection trace these wires back to the engine ECU. The easiest way to do this is to disconnect the connector, remove the screw in the back of the connector and prise the connector apart to reveal the wires.
In practice removing the screw and operating the over centre catch will part the connector.

Build the circuit and insulate the components then after locating the appropriate connections (12v, EGR active low, MAF signal) strip the insulation from the wires and solder the mod in place, then make good the insulation.
You will need to disconnect the EGR transducer electrical connection, so ensure you tape it up to stop any water ingress.

The final installation will look something like this, although normally the wires are tucked away by the side of the loom.

The next diagram is for a ML270 just to show the connections. It's the same components, just different ECU connections.

W210 300TD is:

Switched 12v (sorry, can't remember which pin I used)
EGR signal = Pin 35
MAF signal = Pin 21

ML270 CDi:

12v = Pin 37, plug 3
EGR signal = Pin 60, plug 3
MAF signal = Pin 24, plug 4

I think the above will work for all Vacuum transducer type EGR valves, but the connections may vary.

if you try this mod please report back your connections.

Hi dieselman. Pls help me. My maf pin 5 is yellow brown. I can not find the right ecu plug and pin. I do not know where to start counting for plug id. My car is e220 cdi w210 2002 model. Thank you.

 

[thebiglad]

Hi all, I have a CLK 270 cdi and I'm looking to optimise it. I'm familiar with what EGR's do and am just wondering IF I did this on my car would it be noticeable for the CT (french mot) tester ? I know it's only every two years rather than the UK every year, but I don't want to modify something if it'll give me grief?

On Landys with EGR valves, the dirty exhaust fumes that are redirected have a tendency to block up the inlet manifold quite badly, is this the same on my Merc?

Cheers for any input you guys can give,

Dave

 

[alexanderfoti]

Hi all, I have a CLK 270 cdi and I'm looking to optimise it. I'm familiar with what EGR's do and am just wondering IF I did this on my car would it be noticeable for the CT (french mot) tester ? I know it's only every two years rather than the UK every year, but I don't want to modify something if it'll give me grief?

On Landys with EGR valves, the dirty exhaust fumes that are redirected have a tendency to block up the inlet manifold quite badly, is this the same on my Merc?

Cheers for any input you guys can give,

Dave

Hi Dave

Cannot comment on the French mot, but UK one is unaffected. The same problem does exist, but yours has a spanking new inlet manifold so will be fine for 80k at least!

Hope all is well.

 

[thebiglad]

Hi Dave

Cannot comment on the French mot, but UK one is unaffected. The same problem does exist, but yours has a spanking new inlet manifold so will be fine for 80k at least!

Hope all is well.

To be honest Alex I'm enjoying the car more and more. Was out yesterday for a little bimble - all windows down and about 30° - she just sails along and gives me 50 mpg on a recent run to Dijon (about 800 kms round trip) to go to see the Australian Pink Floyd.

Still have a hankering for another Jag tho' so spoke to my insurance lady this more about multi vehicle policy !!!!!

 

[alexanderfoti]

To be honest Alex I'm enjoying the car more and more. Was out yesterday for a little bimble - all windows down and about 30° - she just sails along and gives me 50 mpg on a recent run to Dijon (about 800 kms round trip) to go to see the Australian Pink Floyd.

Sounds much nicer than here!