This engine has a custom 10+1 trigger (5 pins on crankwheel).
Such installs are usually problemfree (and installer does not care to document publicly).
This install involves some fighting for some reason, page created to summarize that (thematically, not chronologically).
ECU serialnumber v3/6110
Primary trigger
- VR, 5 pins on crank
Secondary trigger
- auditrigger, that is sectrig crankhome-VR masked by cam-HALL, which is (same software setup) but over-complicated hardware (more chance for error)
- NOT just HALL, 1 pin on cam that would be simple
The CAM-trigger is Audi original from AAN (behind the cam pulley).
- The trigger has been used before in the same setup without problems.
- with v3 that (LM1815) uses the falling edge of VR sensor signal ? Or with VIPEC ?
- in any case, we can settle with "it worked before" and stop thinking about it. Or, start to check things for both VR signals: DC voltage level, polarity (amplitude also if possible).
- (Unlike the 3B distributer), in the AAN the cam-HALL signal window is very unlikely to go away from the crankhome-VR pulse but the HALL should also be checked with scope. The HALL can also be measure with DVM (push the car in gear 5, max 4 meter needed for 2 crank rotations, take note of both 0V and 4-5V signal level and mark these 2 engine positions with a pen.)
- if sectrig signal is lost from triggerlog, cam-HALL can be disconnected and pulled constant as an experiment. (To GND if if ECU has cam-HALL inverter)
- a 135 tooth will attempt to start (at good position only about 4-5 times from 10 attempts) but a c010 will likely not even attempt to fire spark (but show sectrig pulse in triggerlog every 5th crankpulse).
- if sectrig signal is lost from triggerlog, cam-HALL can be disconnected and pulled constant as an experiment. (To GND if if ECU has cam-HALL inverter)
Audi 5 cyl. 5 trigger references on crank. 1 cam signal.
During cranking the [trigger log] looks really good with 10 pulses on primary and 1 on secondary
but when it starts it gets "missing tooth" signals, too many pr tr and too less primary trigger. I've logged the two events.
The setup is original for the engine and the sensor is VR.
I'd took some pictures for you to see. Could it be that the crankshaft puts out the signal when the engine starts?
Not impossible, but would be nice to see 2 occasions captured (a triggerlog and a vemslog also). VR trigger is primary candidate, check polarity (both primtrig and sectrig) at least with the DVM DC mode and "pull-away metal" method, or best with oscilloscope.
The car was running with VIPEC before (same trigger?) and no problems, so it has to be in the ECU or maybe just some tuning problems?
coil option is good
> Number of teeth = 10
> first trigger tooth = 0
> next trigger tooth = 2
> Angular width = 72
> Reference tooth (order of arrow)
> 0
> 2
> 4
> 6
> 8
