I'm not new to EFI in general but am relatively new to VEMS. I've just recently started playing with a plug and play motronic VEMS unit.
My current fleet:
1995 Audi S6:
stock 5 cylinder AAN motor
034 EFI Stage IIC standalone system running on 60-2 wheel, waste spark
GT3071 turbo, custom downpipe and exhaust
60lb/hr fuel injectors
044 "motorsports" fuel pump
1990 Audi Coupe Quattro:
3.6L v8 twin turbo (PT code motor from V8 quattro)
034 EFI Stage IIC (actually the same computer as the above car.. good thing I cant drive both cars at once because I only have one ECU!)
dual T3 60 series turbos (.6 A/R)
big-a$$ double row aluminum radiator
crank mounted 60-2 wheel, running waste spark
coil on plug
dual path exhaust (side exit and rear exit, boost actuated side valve)
My plan is to install a PNP motronic VEMS unit on the S6 and keep 034 on the v8 mostly so I can stop swapping the ECU around but also to learn the ins and outs of VEMS.
More VEMS related stuff coming soon!
PNP box is in my S6 now. Some suggested idle settings by Jorgen that I need to try:
(10:00:06 AM) Jorgen1_: enabled
(10:00:09 AM) Jorgen1_: 20
(10:00:13 AM) Jorgen1_: 0
(10:00:15 AM) Jorgen1_: 20
(10:00:16 AM) Jorgen1_: 2
(10:00:19 AM) Jorgen1_: Enabled
(10:00:23 AM) Jorgen1_: 20
(10:00:24 AM) Jorgen1_: 10
(10:00:25 AM) Jorgen1_: 50
(10:00:26 AM) Jorgen1_: 10
(10:00:28 AM) Jorgen1_: 55
(10:00:29 AM) Jorgen1_: 20
(10:00:30 AM) Jorgen1_: 10
(10:00:34 AM) Jorgen1_: 128
CEL - check engine light
wired as: AANpin22 = EC36pin15 = p259/5
- misc2out_channel=57 for p259/5 (that is often fuelpump)
- I'd use misc2 and minrpm=0 maxrpm=05 or so to light it up when engine is off, than turn off CEL when egnine has started
Some potentially useful files for others. Bone stock S4/S6, 1.1.27 firmware:
mostly notes to myself on pure megatune free-air calibration procedures from talking with Jorgen on IRC
key on, engine off
it will come back 'Helo', enter key does nothing, this is normal.
should display the o2 page. repeat until a value is displayed. o2 should be getting hot.
once an o2 is shown, if the value is lower than 20.9, close mini terminal with:
close mini terminal window, adjust wideband cal constant by increasing it 2 or 3 at a time, burn to ecu, back to mini terminal
The mde00 resets the wideband circuit
mll, check wideband numbers.. repeat until 20.9 is attained.