My daily driver, Audi S6 avant -95, 2.3L inline 5, 20 valve turbocharged engine (AAN).
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.
The engine is now running well, some tuning is still ahead.
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 (06-Jan-2006):
My config.txt and tables.txt:
Airtemp sensor data:
These tables seem bad. See the warning on EasyTherm
Some values to make verification easier: Note that pullup is 470 Ohm not 2700 Ohm (or is it a 470 Ohm in parallel with the onboard 2700 Ohm, that would be 400.32 Ohm ?)
- -40,395 temp_internalformat=0, adc_read=117 (256/ (470+395) * 395)
- -20,425
- 0,457
- 20,490
- 30,503
- 40,520
- 60,555
- 80,585
- 100,620 temp_internalformat=254, adc_read=146 (256/ (470+620) * 620)
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)
- 5x high-Z injectors (INJA..E to M36,M17,M34,M35,M16, INJA = cyl #1 and so on)
- 5x ignition coils (with power output stages) (IGN00..04 to M01, M02, M23, M20, M21, IGN00 = cyl#1 and so on)
- so h[2]=03 01 00 02 04 ... required to match 53124 fire order as requested on InputTrigger/AudiTrigger !!!
- BoostControl solenoid aka WGFV (INJG to M33)
- Idle air controller (INJH to M04)
- Fuelpump relay (P259/5 to M03)
- 3x trigger signals, 2x VR (M47 home signal, M49 rpm, M48 GND) + 1x hall (M08), InputTrigger/AudiTrigger setup
- GND and Supply voltages
- to board itself with additional relay
- 5V to hall, TPS (EC36/28 to M12)
- TPS sensor (M53)
- CLT (M45), IAT (M44) sensors
- Tachometer (M40)
- Knock sensor
- WBO2 sensor
- original MAF connector is not used with VEMS. There are only 3 signal wires + gnd + supply, so MAF wiring is not usable for WBo2. Anyway, MAF uses 6-pin JPT connector, VAG part 022906233A for housing + 022906102B boot
Will add wiring diagram later..
Hardware changes made to V3.3 board
- Trigger related
- R182 shorted (instead of 100k in primary trigger)
- 10k pullup to 5V for crankhome VR signal
- crankhome VR inverted in firewall connector, not as in original motronic
- C103 replaced by 1nF
- All ign channels changed to logic level
- IAT pullup changed to 470ohm
OLD Config notes
- injpwm=FF # highZ injectors
- req_fuel=50 # is that for max VE = appr 200 ?
- cwl=5A # might be close
- cwh=19 # maybe a bit high but you'll see when it warms up :-)
- primep=26 # give it a little (3.8msec) in cold
- primep_temp_scaling=00 # but not with hot clt
- awev=0D # try to increase, upto 40 (+64%), especially when warmup and other tables are unknown yet
- awev_temp_scaling=80
- ...
Since this had been written, config values have been merged from a similar running engine:
MembersPage/NanassyPeter/Config so use Peter's config. Values that were updated:
- injector (primarily cwl, cwh, req_fuel and injpwm)
- trigger config (according to InputTrigger/AudiTrigger )
My car is a s2 coupe turbo quattro but only distributor based.
I use all factory sensors and valves through a flying cable set.
Can you send to me your recent msq.file.Thanks!