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Title: Can't figure out why ECU dissable lambda control during WOT Post by: BlackT on June 11, 2022, 03:35:42 PM This is car I worked long time ago and today it came in my hands for adding some more stuffs. Also I made log to see how engine work
it have a lot work on it, need MAP and N75 change, also must check timming chain beacuse It have -5 KW intake cam etc.. But one thing I can't figure out, why it shout off fr_w? IT does not hit LALIUSMN, also lambda control is under +25%. What else could be? I never see something like this. I am going tru FR but can't find anything Boost is over desired but that should not turn of fr_w Ignition goes to negative(-8KR) but also I seen worst case but never that this will trigger off fr_w Also don't have car now to log rest variables for lambda control, but I am curious what it is WOT in last gear from low rpm stock 225 bhp TT injectors k03s turbo most stock 225 hp flash with slight boost incrase,pops,and emmision dellete Title: Re: Can't figure out why ECU dissable lambda control during WOT Post by: IamwhoIam on June 14, 2022, 03:14:04 AM Are you sure it's a wideband ECU and it's not narrowband? just checking
Title: Re: Can't figure out why ECU dissable lambda control during WOT Post by: BlackT on June 14, 2022, 07:49:25 AM Heheh narowband don't have curent air to fuel ratio.
Yes it is BAM ECU with LSU 4.2 Title: Re: Can't figure out why ECU dissable lambda control during WOT Post by: denniss112 on June 14, 2022, 09:11:12 AM For some reason I cant get a graph in ECU Plot with your file.. What are the EGT's? There is a whole piece on the forum about KFLBTS controlling your AFR's when TABGBTS is reached.
Title: Re: Can't figure out why ECU dissable lambda control during WOT Post by: Blazius on June 14, 2022, 09:43:03 AM Without looking at logs, I am sure you know, but all wideband me7.5 I've seen disables wideband lambda control after a certain threshold on WOT, never looked much into it but I am fairly sure it has to do with safety , guess you dont wanna make correction at WOT from a bad sensor/poisoined sensor. You need to check conditions as for what it is, egt , control limit over a period etc.
Sometimes it keeps last value too, there were discussions about this behaviour back then. Oh yeah I forgot it also gets turned off with BTS... but if you wanna check actual conditions refer to above Attached is a bad tune/bad sensor car but I've seen this behaviour multiple times, had a switch off at 3.5k or so cause of threshold exceeeding, then on top RPM it just set value even when lower read limit of the sensor is exceeded. Title: Re: Can't figure out why ECU dissable lambda control during WOT Post by: tao13 on June 14, 2022, 12:10:37 PM BAD FUEL PUMP!
Title: Re: Can't figure out why ECU dissable lambda control during WOT Post by: Blazius on June 14, 2022, 02:17:13 PM BAD FUEL PUMP! He didnt log EGT, or any of control related bits to see, EGT too etc. hardware issue is another problem. Title: Re: Can't figure out why ECU dissable lambda control during WOT Post by: BlackT on June 14, 2022, 03:09:05 PM Without looking at logs, I am sure you know, but all wideband me7.5 I've seen disables wideband lambda control after a certain threshold on WOT, never looked much into it but I am fairly sure it has to do with safety , guess you dont wanna make correction at WOT from a bad sensor/poisoined sensor. You need to check conditions as for what it is, egt , control limit over a period etc. Graph you posted is trigered by LALIUSMNSometimes it keeps last value too, there were discussions about this behaviour back then. Oh yeah I forgot it also gets turned off with BTS... but if you wanna check actual conditions refer to above Attached is a bad tune/bad sensor car but I've seen this behaviour multiple times, had a switch off at 3.5k or so cause of threshold exceeeding, then on top RPM it just set value even when lower read limit of the sensor is exceeded. Not my case I give up from thinking what is wrong here, I will tell friend to fix this other issues on car and then will log again and retune it |