The engine is a bmw s50b32 converted to single vanos on intake with a trigger with one tooth installed at ~60 degree before missing tooth, the vems trigger log also shows this.
The ecu is unit 7148, vr vr and 4 pfet for vanos control
The car runs perfect in wasted spark mode. Is making 806hp at 7700rpm and 1.5bar boost. Now I'm trying to make vanos work on intake so I can make boost faster, now I see 1bar at 5000rpm.
Vanos is working good from the logs I made but I have problems with the secondary trigger.
When cranking the signal is very good and stable, the problem is when I start the engine. I have to many sectrig and I can't rev past 1300, the ecu seams to reset as the afterstart flag comes on.
I tried to play with the filter settings (minimum angle 39, maximum 120) and i manage to filter it a little and now i receive only sectrig pos bad and the engine revs, as you can se in the logs at ~4000+rev the trigger error is gone!!!
I made the following:
- Changed the sensor.Same result
- Changed the sectrig wiring, completely separate from the engine wiring, from the sensor strait to the ecu, Same result
- Changed the polarity of the sectrig. the signal moved to the second tooth after the missing tooth and the logs shows ~350 degrees. This was wrong because the trigger was installed at ~60 ( 9 tooth before missing tooth )... anyway with the polarity change same sectrig errors
- I changed the vems ecu with a similar one ( vr vr ). same result
- I use a oscilloscope to see if the signal has noise or something. The signal is good, a little noise when cranking but good signal when the engine starts.
- I tried and pull the sensor out ~1mm and got less errors and manage to rev the engine to ~2500rpm with no filters , if i try to pull the sensor more than 1mm the sectrig signal is gone.
- I started with firmware 1.1.96, with this firmware the car worked for a few years with the old ecu without the pfets. Now i have firmware 1.2.11
I will try to look again at the wiring, grounds and maybe rewire the crank and cam triggers!!!
I don't know what "ignore sectrig pulses above" and "maximum primary edge between secondary edges" does?!?! How should i configure this settings???
Please let me know if you have any ideas
trigger logs: http://www.vems.hu/files/Catalin_S50/