Hallo, i was amazed as i saw today that there is a PNP Motronic VEMS.
The question is now how PNP is it and what must i change.
- be warned that there are many different motronic pinouts. You have to identify and verify yours
- if you correctly identified and verified, it should be rather simple to get the car running if it's a tested setup
- As far as i know it is the same as the Audi ABY engine and the later AAN engine with the Hallsensor at the Camshaft pulley. I suppose that this setup is known (please confirm). If it is so, then this means what with the VEMS i can control and setup right away Ignition,injection and boost control?
- if the setup is yet untested, one has to be even more very careful with the pinout verification and documenting it. This is not recommended to someone who would not dare to make a native econoseal install
- if you correctly identified and verified, it should be rather simple to get the car running if it's a tested setup
- using a factory harness can help a bit, if it's in good condition. But any problem can cause a lot of headache, and if there are problem, finding and fixing it is often more difficult than with a self-made harness (or a new documented harness)
- Factory harness is OK right now. The car is original and running every day.
- getting the car running is the start of the fun and risks.
- One has to be very careful with tuning, and be prepared to stop and go back to the measurements and debugging, should the slightest suspicion arise. Tuning requires knowledge and experience. It is highly recommended to get someone experienced help, at least for the first few times.
- one has to plan any modification very carefully. It is very important not to ruin something important (in harness, ground, flyback, fuses, or ... config).
- Of couerse. My main consern is the instalation and Set-Up of the VEMS on my car. If the sensors are recognized and work right after the VEMS is plugged (and with the initial - Basic maps) with Megatune. After that i can get someone to tune on megatune.
I am not very electronically inclined so my questions are dumb:
I plug the VEMS PNP-Motronic to the harness, istall and connect and verify and calibrate the Wide band and the EGT. Is the car now ready for the Tune?
The VEMS comes out of the box with support for the Ignition, injection and Boost control without further mod to the Sensors or the cables of the Car?
Is it possible to find for starters a full runing program for the ADU engine, and from that point modify it further?
- we have full running dumps for ADU engine (and 3B, which seems to need slightly higher pulsewidths) but even from a conservative one, one has to be very careful (add more fuel, take away some ignadv, verify lambda, EGT and sound, etc...) and tune almost like it was an unknown engine. Such configs help to get the car started though
Hi, i am thinking of Using the VEMS v3.x on my currently Stock Audi RS2. It has from the Factory an I5 2.2. liter Turbocharged engine (Engine Code-ADU). The stock ECU system is a Bosch Motronic. For the future i am preparing a strong bottom end and big turbo.
The car is an everyday car and want it to have a cultivated ride (when i am cruising with it or in the City). I want the Climate Control (Air Condition), Auto Check (it has also Trip Computer but i think it will not work with the VEMS).
I would like to make the convertion this way so i must only change the less possible stuff to run on Vems (and also easy to go back to the Motronic system if the car will be sold).
I connected VEMS and tried to connect it to the PC.
The connection is Succesful but i become a Message that the tabes between controller and MT doesnt match.
I Choose 16X14 and it says the Controller has 12x12. I made a FirmwareUpdate to 16x14 but i still become the same message.
- follow VemsAudiAan
- You will use v3gui to upgrade firmware to 1.1.27 firmware and use
- 12x12 is recommended, you don't need 16x14 at all
- [starting config] and tables
- MT Version 1.1.23rc will read real injector pulsewidth / 10, so you need 1.1.27 or similar. Choose 12x12 high-boost at startup
If you have pinout for ADU, we can check if the cyl1 <=> 3 ignition is swapped, so we can hint h[2]= ... change if necessary.
MAT sensor
- measure MAT sensor resistance at know temperature.
- if you use the factory PTC type sensor (appr 500 Ohm at 25C), than ptc_260_425 or similar is good (425 is for the internal pullup resistor, which is actually 430 Ohm in your controller).
With bad table chosen at firmware upgrade, the MAT reading will be almost constant, and if it changes at all, it decrease with rising MAT.
2..3.2008
It started with Marcels file. Very nice. Still no EGT and WB installed. Very happy!!!
4.3.2008
I installed the cables for the Lambda and EGT. The 12V connection for the WB comes not through VEMS but separate doesnt it?
I would also like to know about the WBO2 Calibration Constant. Should i measure it or is it mesured from the factory?
- To calibrate wbo2 you have to open the bay terminal in Megatune then type Man mde02 mlp07.
More info here: http://vems.sourceforge.net/manualhtml2/ch07s02.html
Thanks
Done some more today. I am seeing the target
AFR at idle but not everywhere else. I also made a Log.
Here is some throttle while standing and the other one my first log while driving. Also the MT File i done it
- v3.x EGT Calibration 0x4B or 0x4C (75 or 76 in MT) See AfreshTiny/EgtCalibration if you want to verify with an input signal.
http://www.vems.hu/files/Standing%20Throttle.xls
http://www.vems.hu/files/drive.xls
http://www.vems.hu/files/changes.msq
OK, done some more and i am very pleased with the Results. Car runs fine with this basic tune. I have tryed to controll boost with VEMS but i somehow cant get it, till now!
So i start:
1. It is set to MAP Target but i am going to run it at Boost Target (page was down so i couldnt read about boost settings).
2. Boost is set to 200 kpa but it somehow goes till 240. Right at 240 kpa it takes fuel off - must search why i cant see any that can cause this but maybe i am blind.
3. Must see that somehow i get the knock to work. Dont even know if my channels are correct.
http://www.vems.hu/files/Boostlog1.xls
http://www.vems.hu/files/mallon%20kalo.msq
13.3.2008
So after running with VEMS and daily use some other issues that i dint solve yet are:
1. After crank up the RPM stay for several seconds high and then it starts going from 1000-1500 RPM so as if i the throttle kick and let and then again. After ca. 30 seconds is it away and idles very nice.
-Do you think i should do the diode install?
http://www.vems.hu/wiki/index.php?page=MembersPage%2FPeterJensen%2FAudiSidle
Here is the start-up
http://www.vems.hu/files/Idle.xls
Boost-control
2. I cant set the boost control up correct. I tryed and set the boost control so now i dont get Fuel cut because on the Inj PW and noticed that i get the Boost i want (almost) but it is not stable. I set it to 1 bar and i get 1.1 then goes down to 0.85-0.9 then again to 1.1 then again down ect.
This is the RPM vs Boost vs TPS log:
3490 167.0 99
3550 173.8 99
3605 181.0 99
3669 188.5 99
3733 197.8 99
3797 206.5 99
3870 214.5 99
3926 201.0 99
3939 188.0 99
4092 192.0 99
4115 202.8 99
4146 212.5 99
4297 212.8 99
4249 196.5 99
4338 184.5 99
4421 185.0 99
4447 197.8 99
4587 211.3 99
4622 204.0 99
4618 189.8 85
4559 162.0 5
i have logs for everything. But mcd-mct for nowthing ? ;-)
The boostcontrol is usually almost a PD-controller.
P=255
D=... hard to tell (start with decimal 20)
The I value can be close to 0. Usually there is no time for the I to act in gear 1 and gear2.
As a result, there might be a systematic error (eg. you set 190 kPa but get 210 kPa, this also depends on the boost valve reference position: 1/5, (start with this: 2/5), 3/5, 4/5 (you will get highest actual boost with 4/5, likely significantly above target).
Still have the boost fluctuation problems with the N75 control and i am not so pleased with it yet.
I just realized what crap i writed about the overrun Fuelcut and resume. I was not thinking.
Today i installed the Diode and set the boost settings as mentioned above. Warm car startup is very nice and the boost very smooth. Thank you very much for your help. I am very happy with the Results.
The next step would be to set the knock sensing better than i have now.
Thanks again
Anybody knows why now and then i have this problem during idle. It seems that the Idle valve doesnt respond so fast. It gets worse with AC.
Can it be that my Idle valve is faulty? It happens occasionaly.
http://www.vems.hu/files/Bad%20idle.xls
This is my file at the moment:
http://www.vems.hu/files/After%20Diode%20and%20Boost.msq
Please comment or suggest changes for EGO, VE-Autotune, Idle ect. Whatever you think is wrong please comment.
Thanks
MembersPage/Billman/VEMSOptions
MembersPage/Billman/BuyingList
Thanks a lot
Vasilis