antonl Posted September 20, 2021 Report Share Posted September 20, 2021 Hello! I having some trouble with a s54b32. Engine missfire betwen 5500rpm to 6000rpm. We have changed sparkplugs and ignition coils but no difference, it is possible to to reduce the missfires a bit if we go wery lean. I have also tried to play around with different ignition settings like dwell time etc.. but no difference missfire.pclr missfirelog.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 20, 2021 Report Share Posted September 20, 2021 By the amount of dwell scatter you have in the log I would be suspicious the ecu is not happy about something trigger related. Can you do a triggerscope at about 2000RPM. Quote Link to comment Share on other sites More sharing options...
antonl Posted September 21, 2021 Author Report Share Posted September 21, 2021 okey, Here is triggerscope log from 2000rpm 4000rpm and 6000rpm 6000rpm Trigger Scope Log 2021-09-21 6;34;27 pm.llg 4000 rpm Trigger Scope Log 2021-09-21 6;32;43 pm.llg 2000 rpm Trigger Scope Log 2021-09-21 6;30;14 pm.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 21, 2021 Report Share Posted September 21, 2021 Ok, the crank sensor is wired incorrect polarity, swap the +/- wires at the sensor connector. Recheck timing offset after fixing that. Kevin Tyler 1 Quote Link to comment Share on other sites More sharing options...
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