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Title: Audi S6 4.2 340HP problems with air mass Post by: kaross on November 14, 2013, 01:04:55 AM Hello!
Maybe someone can help me with diagnostics with one car. It is Audi S6 4.2 340HP. There is problems with air mass. it drops few times at WOT from 2000-7000rpm. for example 150g/s then 145g/s, then goes up for some time and then again 180g/s - 177g/s and up. what could be reason here? I was thinking about ignition problems, but can't find right cylinders in measuring blocks. looked in original software and there find 2 measuring blocks (15, 16 in VCDS) first 88 95 93 90 second 89 92 94 91 from funktionsrahmen file I get 88 dwkrz_0 zylinderindividuelle Z¨undwinkelsp¨atverst KW 95 dwkrz_7 zylinderindividuelle Z¨undwinkelsp¨atverst KW 93 dwkrz_5 zylinderindividuelle Z¨undwinkelsp¨atverst KW 90 dwkrz_2 zylinderindividuelle Z¨undwinkelsp¨atverst KW 89 dwkrz_1 92 dwkrz_4 94 dwkrz_6 91 dwkrz_3 0 is cylinder 1 (first) or how can I understand which is which cylinder? for example like bank 1 cylinder 1, 2, 3, 4? I don't have label file with written under Cylinder 1, cylinder 2 e.t.c I hope you guys understand what I am looking for. also attached logs. Title: Re: Audi S6 4.2 340HP problems with air mass Post by: ddillenger on November 14, 2013, 01:15:10 AM ;dwkrz_0 ;{IgnitionRetardCyl1} ; {zyl.ind. ZW-Spätverstellung inkl. Dyn.vorhalt}
;dwkrz_1 ;{IgnitionRetardCyl8} ; {zyl.ind. ZW-Spätverstellung inkl. Dyn.vorhalt} ;dwkrz_2 ;{IgnitionRetardCyl6} ; {zyl.ind. ZW-Spätverstellung inkl. Dyn.vorhalt} ;dwkrz_3 ;{IgnitionRetardCyl3} ; {zyl.ind. ZW-Spätverstellung inkl. Dyn.vorhalt} ;dwkrz_4 ;{IgnitionRetardCyl2} ; {zyl.ind. ZW-Spätverstellung inkl. Dyn.vorhalt} ;dwkrz_5 ;{IgnitionRetardCyl5} ; {zyl.ind. ZW-Spätverstellung inkl. Dyn.vorhalt} ;dwkrz_6 ;{IgnitionRetardCyl7} ; {zyl.ind. ZW-Spätverstellung inkl. Dyn.vorhalt} ;dwkrz_7 ;{IgnitionRetardCyl4} ; {zyl.ind. ZW-Spätverstellung inkl. Dyn.vorhalt} Taken from ME7Logger cfg file. I know this is a newer engine, but the numbering is the same: (http://www.audi.tigran.lv/images/audi_v8_engine_cylinder_location.gif) Title: Re: Audi S6 4.2 340HP problems with air mass Post by: kaross on November 14, 2013, 01:46:59 AM thank you very much!
Maybe any thought about air mass? I will try to do logs with ME logger. Car is MY2000. Do I need to wire straight K-line from OBD to ECU? Title: Re: Audi S6 4.2 340HP problems with air mass Post by: prj on November 14, 2013, 05:42:32 PM It will log over OBD, set SLOW-0x00 in .ecu file and turn ignition on, let it connect, then start the car.
Title: Re: Audi S6 4.2 340HP problems with air mass Post by: buergi on April 15, 2014, 02:31:26 PM Hello,
may i ask if you have found a solution to this ? A friend of mine just bought a 2000 s6 with AQJ Engine. The car doesn't feel like 340hp, so we logged some channels. Air mass looks very jumpy. Is it Ok as it is a NA engine ? Anyone an idea what could be wrong ? best regards, buergi edit: attached .csv Title: Re: Audi S6 4.2 340HP problems with air mass Post by: ddillenger on April 15, 2014, 02:37:19 PM Airmass is usually jumpy in NA. Post a CSV please.
Title: Re: Audi S6 4.2 340HP problems with air mass Post by: buergi on April 15, 2014, 03:13:28 PM thanks for your quick reply, i attached a csv.
We made some 0-100k/h tests with a cumulated weight (car+driver+passenger) of about 2100kg. 9s to 100km/h.... buergi |