kaahari Posted December 12, 2009 Share Posted December 12, 2009 (edited) Hi! How you get proper afr:s at idle using emu? I tried to look threads about running rich on idle but did not find answer. I have injector adapter fitted, running ~10,5 AFR at idle, corrected by airflow map -30% without correction 9,7 Quite black smoke when tipping throttle btw ij size is 440 and lag 0.0 (i have stock j-spec injectors), warm engine, no fault codes, i wonder why ecu dont compensate to 14,7? rpm was ~1300 on start and ~950-1000 with warm engine. Edited December 12, 2009 by kaahari (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 12, 2009 Share Posted December 12, 2009 (edited) Why have you got the aiflow map adjusted if you are using std injectors? Is the rich AFR during warm up or hot? Edit: sorry just reread and see its hot engine. Check all other settings, as it seems there is something not behaving as it should. I would also re check that you have the injector connections correct. Edited December 12, 2009 by Tricky-Ricky (see edit history) Quote Link to comment Share on other sites More sharing options...
kaahari Posted December 12, 2009 Author Share Posted December 12, 2009 (edited) Why have you got the aiflow map adjusted if you are using std injectors? Hi! I started car with "blank" map (emu was previously on jspec supra also), only injector map active (all settings to zero). Airflow map is also zeroed, just tested that emu is working and tried to edjust idle via airflow map.. Have to check connections! edit: btw installed also walbro and new fuel filter but with stock pressule regulator, it shoud not affect anything... (?) Edited December 12, 2009 by kaahari (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 12, 2009 Share Posted December 12, 2009 Although the EMU should report an error code if injector connection's are wrong its not always the case, make sure the injector adaptor is wired correctly, and the polarity is correct on the injectors. Quote Link to comment Share on other sites More sharing options...
kaahari Posted December 12, 2009 Author Share Posted December 12, 2009 (edited) Now all connections checked, also remake map settings and recalibrated wideband. Went to right direction (possibly typo on map basic settings etc) but still wondering idle lightly rich afr:s. Now 12 on idle.. slightly starting to rise (ecu narrowband making corrections slooowly) until reaches 14,7. Then, if i touch throttle, back to 12.. and start rising again...slooooowly Ok, i can now get it idle right using ij map, but just wondering is this normal with emu? If thinking with common sense, afr:s should be 14,7 all settings zeroed. Or if it is emu "feature" ? btw when raising rpms to ex. 2000rpm, right away ~14,5afr. Or maby it`s just hard for emu to compensate lag times on really low duty cycle times and you cant notice "the small error" on higher duty cycle times. http://www.dvdplaza.fi/galleria/data/1034/picture1.jpg Edited December 12, 2009 by kaahari (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 13, 2009 Share Posted December 13, 2009 First question, what make of wideband have you got fitted? Are you going by the display on your wideband, or the EMU log? Second is how have you got the EMU wideband input set? Are you sure that you don't have the self tune map enabled? Also you haven't got the EMU log scaled correctly, so its difficult to see any trends. You should not see any big changes in closed loop, as the std ECU will just fight any changes that you input to the EMU via the injector map. Yes the EMU is not great at lag times, so it may be worth experimenting with this. Quote Link to comment Share on other sites More sharing options...
kaahari Posted December 13, 2009 Author Share Posted December 13, 2009 (edited) First question, what make of wideband have you got fitted? Are you going by the display on your wideband, or the EMU log? Second is how have you got the EMU wideband input set? Wideband is innovate, lc-1 kit. Wideband has own display also, it shows same values as emu. Input is set to "innovate" and voltages like in innovate manual. I think wideband is calibrated ok, because if i rise rpm to for example 2500rpm, afr:s are then about 14-15. Are you sure that you don't have the self tune map enabled? Also you haven't got the EMU log scaled correctly, so its difficult to see any trends. Self tune is not enabled. I just tested logging, i should have logged more.. but if you look pink line of afr, you see that after pushing throttle a bit, it goes more rich (propably oem acu acceleration map?) then, when rpm goes back to idle, afr:s go to about 11 and then starts to rise slowly. Injector duty time starts go lower, as std ecu controls them. You should not see any big changes in closed loop, as the std ECU will just fight any changes that you input to the EMU via the injector map. Yes, that was the weird part. I thought (by reading a lot of threads conserning emu) that std ecu should make corrections more faster :blink: But.. when spring comes, and i get car out from garage, definetly more testing btw: i saw duty time about 1.9-2.0 when it settled to about 14 afr... is it right? btw2: now, when looking temp readings again, it shows only ~50 degrees, but i watched my oem water temp gauge on gauge cluster, it showd 90?? Hmm.. could that be broblem that engine wasnt warm enough? Edited December 13, 2009 by kaahari (see edit history) Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 14, 2009 Share Posted December 14, 2009 (edited) Are you sure the wideband settings are correct? Only the amout you are apparently overfuelling should cause the engine to have a very poor cold start and to stumble and stall when the revs drop back down to idle. That graph shows the return to idle to be quite steady and have no dip into the 400rpm territory. Also, the injector duration is about right - 2.4ms at 900rpm warm idle. Oh and mine reports the max water temp to be around 56degC as well, and the airflow temp is totally useless. Don't worry about that, it's just the EMU misinterpreting the signals. -Ian Edited December 14, 2009 by Ian C (see edit history) Quote Link to comment Share on other sites More sharing options...
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