stephan Posted October 18, 2017 Report Share Posted October 18, 2017 hello l use G4+fury ecu, the problem l have is dead time cycle on battery volt, have no charging systeme used. !!! Dragbike with 2 injector by intake runner. 1- l made a run at 13 volts bike run good on AFR 13.2 2- made another run and battery volt drop to 12.23 AFR look rich 11.5 a setup the fuel again to 13.2 AFR going to another run battery volt going to 12.45 volt AFR is good 13.2 3- next run exemple: battery volt going 13.v again AFR going to be very lean again..16.1 at top end ... it`s look the injector dead time table dont work good. with Variance of volt. thank you Stephan Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 18, 2017 Report Share Posted October 18, 2017 Deadtime can make quite a difference to Afr at low rpm where it is a significant proportion of the injector pulsewidth but if you are seeing afr changing at high rpm/load then it is unlikely related to deadtime as it is then a much smaller proportion of total pulsewidth. You can log actual pulsewidth, effective pulsewidth and deadtime if you want to see what has been applied. I would also suggest you log fuel pressure. Quote Link to comment Share on other sites More sharing options...
Steve Posted October 18, 2017 Report Share Posted October 18, 2017 And fueltemp. What injectors? There are some bosch injectors that really are for LNG that gets very weird as the fueltemp gets higher. Quote Link to comment Share on other sites More sharing options...
stephan Posted October 18, 2017 Author Report Share Posted October 18, 2017 Ok l ll look that .. At .55 volt difference look AFr change .... l use Five Ops injector thanks Quote Link to comment Share on other sites More sharing options...
stephan Posted October 18, 2017 Author Report Share Posted October 18, 2017 Moderators 162 1,337 posts post Posted 42 minutes ago what could create this problem , with out fuel systeme: fuel pressure alway good, injector test check on flow bench all is ok. Always variation on AFR when volts change. where to look ?? problem is here since installation ... Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 19, 2017 Report Share Posted October 19, 2017 There are too many possibilities to even guess. Please attach a log and map so we have some data to help narrow down the possibilities. Quote Link to comment Share on other sites More sharing options...
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