Home build genboard 3.8b, SN: 11034
While driving, ignition misfires suddenly occurred from 5500 rpm when the boost pressure is reached, 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.
Bosch LSU 4.9 sensor
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.
wbo2_abs_limit=E0
wbo2_limit_maxt=F0
wbo2_fallback=71
wbo2_retry_t=06
wbo2_ri_target=B4
wbo2_nernstdc_target=86
wbo2_pump_pw_zero=67
wbo2_calibration=C2
wbo2_heater_pid_kp=45
wbo2_heater_pid_ki=11
wbo2_heater_pid_kd=1A
wbo2_heater_pid_ilimit=80
wbo2_pump_pid_kp=15
wbo2_pump_pid_ki=4E
wbo2_pump_pid_kd=00
wbo2_pump_pid_ilimit=FF
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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