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MembersPage/BerndBAan (2024-05-21 07:25:47)

Home build genboard 3.8b, SN: 11034

While driving, ignition misfires suddenly occurred from 5500 rpm when the boost pressure started, the lambda value went to 0.65.

I then checked the lambda calibration and it was out of range. Previously I had the calibration value of 161 and now I had to set it to 208 to get to 20.9%. Now I'm not sure whether my lambda control is working properly. To test this, I measured all the values.

GND to Pump- : 4,04V

Pump+ to Pump- : 0,611V

Nernst to Pump- : 0.939V

I try to adjust Pump-pw-zero and wbo2_nernst_dc_target, i changed the values in vemstune, but on the multimeter nothing changed.

The sensor heating works proberly.

I think the problem was triggered by a defective fuel pump relay and interrupted the flyback while driving. Is it possible that the two ICs U7 and/or U17 (LM324) have been damaged?

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Home build genboard 3.8b, SN: 21528

I build the board with Auditrigger.

Primary trigger signal works perfect

SJ6 closed (primtrig VR)
R30 = 1802 (18k, good)
135 cranktooth to EC36-27

But no secondary trigger signal. Can you check my board configuration?

SJ7 closed (sectrig VR or auditrigger, good)
2nd LM1815 installed
SJ4 middle and bottom closed
R248 = 2701 (2k7 pullup)
Q13 = BC817
62 BTDC connected to JP20
Hall sensor to EC36-13
Instead of HALL sensor, please connect the EC36/13 to GND temporarily as a test. That will deactivate the BC817 (NPN transistor) and allow the 2nd LM1815 signal output to reach main processor. (although both pulses will reach the processor, one of which should be filtered normally)
- It is possible that the HALL window is not at the correct position (around the crankhome-pulse "Z?ndzeitpunkt") as on InputTrigger/AudiTrigger
- 2 channel scope needed to verify this easily, but the above test will give a good hint.