MembersPage/MiskaPeippo/AudiSSix (2006-08-28 21:35:57)

My daily driver, Audi S6 avant -95, 2.3L inline 5, 20 valve turbocharged engine (AAN).

s6_etu_small.jpg

Installed VEMS as direct replacement of original ECU (see PlugAndPlayMotronic) using factory wiring. Extra wires are needed only for WBO2. There are some modifications with the trigger wires as well (swap secondary VR signal wires in 3pin JPT connector on firewall)

The engine is now running well, some tuning is still ahead.

Some open issues to solve

(i had exactly the same thing in my typ 85 with stock motronic AAN connected to the stock coil driven tachometer,specially in higher revs.A resistor solved the problem.But i dont know what is the problem in your setup,hope you find it and share.good luck:MembersPage/NanassyPeter)

Note about the time-saving effect of wiki-written documentation

It's notable that this install was carried out before other competing installs (despite that it was done in the cold, while competing installs had a warm garage host), because documentation discipline was appr 60%.

Competing installs have 10 and 40% documentation discipline so they lost, and might struggle for a few more days or weeks.

Even for this install, 3..5 days could have been saved with 90..100% documentation discipline, the firing order alone could have saved 1..2 days.


Megatune settings for 1.0.34 firmware package (22-Feb-2006):

[MT config]

mcd.txt and mct.txt (07-Mar-06):

[mcd.txt]

[mct.txt]

Airtemp sensor data:

Some values to make verification easier: Note that pullup is 470 Ohm not 2700 Ohm

Note that the tables are quite steep. The MAT goes from min to max from position 0x75 .. 0x92.

For the prepared tables, look for "PTC" on EasyTherm


Flying wire adaptor for basic functionality from genboard (v3.3) towards motronic connector (pins Mxx)

motronic_vems.jpg

Will add wiring diagram later..

Hardware changes made to V3.3 board


We have expericenced some very annoying problems around 6000rpm in two different cars / ECMs using auditrigger setup.

Symptoms are either cut spark or excess amount of fuel and loud bang once things continue to work properly - but so far logs seemed to be ok. This behaviour doesn't seem to be depending on engine load and it is possible to see it without any gear engaged or in heavy acceleration. However RPM where this is seen is constant 5600/6100 and 5900 in other car. If one keeps on pushing gas pedal, engine will eventually gain rpm and gets over this point.

Some notes:


Here is some data finally: http://kapsi.fi/~mpeippo/fileet/temp/VEMS.zip

Any ideas anybody?


Hey Miska,

what is the current status of the Auditrigger?Did you fund the pest pullup values yet??Im really interested to go with the stock trigger setup on my AAN/3B hybrid,instead of the sloppy 5 window hall!!!Please tell me your final resoults (special problems,what for watch out etc.),

thanks in advance, MembersPage/NanassyPeter

Trigger works just fine, all related HW modifications are as listed above:

Internal (in ECM case)

External:


28.8.2006

Hallo Miska,

now your car is running well? How is the start-up, idle and warm up? How does your car behave in Part and WOT?

Do you managed to get the Knock sensors to Work?

What ignition system are you using? The same as ABY and ADU? Your cylinder head seems like the 3B one.

Can you please post your latest MT file?

Thanks

Vasilis, MembersPage/Billman