Audi RS2: Long Block 2.7 liters, Motronic VEMS, 7.5 to 1 Comp, Precision 6265, 10 bosch injectors 550cc @4bar. 034 DIS high output coils, 60-2 crank sensor.
Audi ADU very bad cold start
LoloQuattro 07/02/12
Thanks for your request for additional details, I have inserted some clarification
03/02/2012
Now the hot start and idle is solved, I still have a problem to start.
Here are the parameters for cranking.
Priming, crancking setup
Primepulse 0.0ms
Hot start primep temp scaling 20%
Cranking threshold 399rpm
Crank Ignition advance 9.0°
Crank VE 60%
Afterstart setting (-40°c) 12 cycles
Afterstart Warm Time (77c) 0 cycles
% of Warmup Enrichment at highest RPM 66%
% of Warmup Enrichment at 100kpa 90%
My crancking enrichissment curve is:
-20°c 300%
0°c 200%
30°c 150%
70°c 100%
Afterstart Enrichment curve
-20°c 275%
0°c 181%
30°c 138%
20°c 100%
Warmup Enrichment Curve
-40°c 140%
-30°c 135%
-20°c 130%
-10°c 127%
0°c 124%
10°C 120%
30°c 110%
40°c 107%
60°c 100%
69°c 100%
IAC duty at crancking
-40°C 85%
77°C 42%
IAC reference curve just some points
-40°c 60%
...
0°C 30%
...
69°C 23%
Any suggestion ?
What kind of injectors and fuel do you use?
LoloQuattro 07/02/12
Bosch green 440cc
- assuming on pump gas (?)
How starting is bad? Is it cranking forever, or firing some strokes but cannot rev up, or revs and dies? ...
LoloQuattro 07/02/12
It did not start at all, it is crancking forever, I must inject Ether to have a start and then it is OK.
Once warm if I stop, it can restart it is OK.
You should give more details, preferrably your full vemslog/vemscfg files.
LoloQuattro 07/02/12
I have recorded log, how to put a link or attach them to this page?
LoloQuattro 08/02/12
I am currently trying to understand how to upload my log.
Thanks for the advise