EGR Emulators

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Originally Posted by Stuart02

Is checking whether the EGRs are closing properly difficult (or secret squirrel), or does it require the emulators to be installed first? Cheers

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Its quite simple, here is a quote from what Mark sent to me: "Put your ignition on and put your volt probe into pin 2 (white in the image) and you should see something between 0.7 and 0.9 volts. It will be a very similar voltage on both sides. Put your probe into the back of the pin socket nice and straight as you do not want to short it with the pin next to it. This is an easy way to prove your EGR's are closed" hes talking about testing with a multimeter and closed EGR's testing with 0.7 to 0.9 volts. You test before you disconnect the EGR plug to instal the emulators. Here is a pic of pin 2. Also, if they weren't closing properly you would apparently get an error code logged as when you turn on the ignition the cars ECU checks the EGR voltage and if it is not in the range mentioned it logs an error. Hope that helps.

Any one had any problems with their emulators , mine have chucked a P0402 code ,no other problems , Gally is looking into it .

I had problems with mine code P0402 U2023 U0100 U0416 U0401 U0402 U0416 Put the vehicle in limp mode lowered vehicle limited gears available etc had to unplug to get the car back home. Gallie is looking into the problem.

Hi, I finally made it back onto the forum. I have been flat out testing.

There are 3 out there in total that are giving the low flow error. I have been putting the latest set of emulators for the D3 2007-2008 and all D4 3.0 through their paces to make sure they perform perfect.

There is a specific update from Land Rover that covers certain ecu numbers and calibration files mainly 2007-2008.

The Engine ecu wants to see a reduction in airflow through the airflow meter as the engine gets air from the exhaust.

It is hard to detect which cars have this certain calibration file without diagnostic equipment such as JLR SDD.

There are EGR Emulators fitted to many 2007-2008 Discovery 3's and have no issues at all, as not all cars within those years have the ecu that logs the P0402 fault.

The TDV8 3.6 and 4.4 models are not effected by this problem at all and neither are most D4 TDV6's

It seems that Land Rover really pushed hard on the Euro 4 emissions for those 2 years but then changed the software afterwards.

The latest set of emulators will tap into the airflow meter circuit and will show the engine ecu a reduced airflow reading whilst the egr vavles are almost completely open.
This will not effect the running of the vehicle as the engine is still receiving all the air it needs through the Air flow meter instead of the exhaust and perfect running is obtained by the MAP sensor.

The Maf is mainly used to diagnose air flow problems to the turbos.

The engine ecu uses the MAF reading and correlates it against the manifold pressure sensor to determine if there is a boost leak or an issue with the turbo performance.

In the tune maps or calibration file maps there is a manifold pressure map and an airflow meter map so the engine knows what the manifold pressure and airflow meter readings should be at any given speed/torque and egr value.



The later set of emulators are very close to being released. I am just being thorough in the testing phase to ensure they run absolutely perfect.

Thanks for the update Gally , all beyond me but sure you have a handle on it , also read your comments on the UK disco 3 site good write up ! . Looking forward to the new updated set to arrive . Al .

Hi Gally, Mine is a late My09 D3 and has the problem so does that mean that the problem stretches over more years like 07 to 09 than first thought. I too thank You for the update. I am changing the water outlet assembly on the weekend so will be cleaning out the electronic throttle body so I will have a clean start when the replacement emulators arrive. Cheers

Gally sent me a PM saying he has answered his UK detractors.For those interested here is the link.
DISCO3.CO.UK - View topic - EGR Emulators D3 and D4
Andrew

Gally , I still have the emulators you sent some 7 weeks with the P0402 code connected , will this do any harm while I await the updated emulators to arrive , no other problems have occurred and 2007 TDV6 RRS running as normal with no other fault codes this will keep my throttle valve area that I cleaned out clean . Are we getting any closer to the updated emulators you have been testing being ready . Thanks 4 any info .

Hi, there will be no harm at all with them connected. I have been flat out testing and programming the new ones.

I just cant afford to take any short cuts with the testing.

I am doing more testing over the weekend. I will let you know shortly.

Thanks for your patience.

Ps I replied to your pm

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Originally Posted by Gally

Hi, there will be no harm at all with them connected. I have been flat out testing and programming the new ones.

I just cant afford to take any short cuts with the testing.

I am doing more testing over the weekend. I will let you know shortly.

Thanks for your patience.

Ps I replied to your pm

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Hi Gally, I got the PM thanks for the info and the update as to where you are at , sounds like it is trying to grab an octopus but sure you will get to the bottom of it . Hope the testing gives good results but all work and no play is no fun either . Al .