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Summary of change:
What trigger settings are reccomended for the following setup? Merc 190 2300 4cyl distributed VR sensor on crank 2 long metal pieces on flywheel (Vemstune scope shows good healthy signals). Is it hard to change to another VR sensor mounted a bit different angle (or away from the wheel, so bolts can be used), or with polarity inverted ? Problem is that the '''negative pulses are placed to TDC'''. * Changing falling<>rising doesnt seems to cure the problem. ** of course, since it's VR => only "rising" setting makes sense for the internal signal (and the LM1815 senses the falling edge) * a possibly option would be to use an external VR=>HALL converter (possibly just an NPN inverter) with HALL sensor input (where edge selection does have an effect) We can run 0 deg ignition at max or 45deg BTDC min. Is this measurement or assumption ? The code has a hardly used feature **MEASUREMENT WITH SCOPE,ON FRONT PULLEY * with comment: // mostly for stock old GM trigger who has 10 degBTDC c004/6/8 trigger ** if ign_tdcdelay is 42 degrees (84 halfdegrees) or lower, and ignadv is higher than that, we allow timing from prev tooth. ** For more precise cranking you place trigger 15..10 BTDC of course. ** Cranking advance at TDC is suboptimal, of course. ** but did you try a very low ign_tdcdelay (eg. 0..5 degrees ?) More details: ---- DC voltage = 207mV Resistance of the sensor = 0,768 kOhm We used the c004 no camsync to get it work. We also examined your config, there were a few validate problems, and strangely 5 primary injectors were configured. Modified config uploaded: http://vems.hu/files/MembersPage/NanassyPeter/Merc/ ---- Peter, compare trigger to 6 cyl M103 engine : MembersPage/MattiasSandgren/MercTrigger //Mattias Thanks Mattias!
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