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Title: Overrun rich 0.75 lambda reguest after rearO2 codeout Post by: curamrdan on April 22, 2016, 11:55:38 AM Hi, just spotted problem on Leon Cupra 1ML906032A_0001 ecu. Car has freeflow exhaust with completely removed cat and rear O2 sensor.
So i codeout it by well know guide(i used it several times already). But after that, i recognized problem. Start a warmed up car, slow cruise lambda reguest 1.00 - all ok. But sometimes(now i can simulate situation almost very often), when i drive for example on 2nd gear, slight acceleration to 2000-2500rpm, lift off throttle, reguest change to 1.047 and after second injection go to overrun and after moment request change to 0.750 which results in real 10-11 AFR. And will no go away until some action again(slight accel ect) i think(i stayed on idle for quite some time and still rich). On stock software it jumps to 0.945 , but i didnt wait if go back to 1.00 , i just saw its different so i start search for a culprit. No lambda feedback when 0.750 request, but works when 0.945 request. Enclosing ori and not checksummed mod, but only mods is shown on picture. And vcds(1+31)log on stock and mod file. Have anybody and idea what is wrong? Thank you Title: Re: Overrun rich 0.75 lambda reguest after rearO2 codeout Post by: curamrdan on April 22, 2016, 01:02:07 PM I probably realized one mistake on CLR(S)HK
First bite must be 1 not zero(or zeroed out) so new value must be 17, right? Double checkd adresses of all changed values, and seems corect. Title: Re: Overrun rich 0.75 lambda reguest after rearO2 codeout Post by: fknbrkn on April 22, 2016, 04:50:06 PM yes
why you zeros CDKVS? Title: Re: Overrun rich 0.75 lambda reguest after rearO2 codeout Post by: curamrdan on April 23, 2016, 01:56:54 AM Thank you. Good spotted. I overlooked this...copied it with group of changes around rear O2 from reworked unknown chipped bin(which has also zeroed CLAATUN,CLADLS and some others... maybe just to be more "resistant" to throwing some fault codes on old mechanicaly wrong car, i dont know, im not used this). I will change it back to 1.
Title: Re: Overrun rich 0.75 lambda reguest after rearO2 codeout Post by: curamrdan on April 23, 2016, 07:53:13 AM CLRSHK to 17
CDKVS to 1 LAMKAML all 1 and still the same. Second gear, slow acceleration to 2000rpm, lift off...decelling after second request change from 1.000 to 1.047 and now i can step on clutch to stop decell , resulting in 0.750 request. It doing also on cold engine. Title: Re: Overrun rich 0.75 lambda reguest after rearO2 codeout Post by: nubcake on April 23, 2016, 08:28:40 AM Try digging through %BBSAWE function in FR.
Title: Re: Overrun rich 0.75 lambda reguest after rearO2 codeout Post by: fknbrkn on April 23, 2016, 01:19:15 PM And after a few secs it returns to 1.047? Its wall wetting func. U sure it wasnt before?
Title: Re: Overrun rich 0.75 lambda reguest after rearO2 codeout Post by: curamrdan on April 23, 2016, 02:34:26 PM BBSAWE is also meaned in S4wiki in second part of rearO2 egt model fix. Which i didnt made, i will do it tommorow.
No it not return to 1.047... when i stop and letcar idle, it its pegged on 0.750 for a half minute for example (cca what i tested, then i continue driving). And when goes back, it goes back to 1.000 request. I just go through damos and found probably mistake on CLRSKA adress, will test it first. EDIT: Yes, correct CLRSKA fixed the issue, ufff... |