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amd is the best
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« on: January 26, 2018, 05:15:51 PM »
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Has anyone seen this before? I can't for the life of me figure out what is causing my lambda control to do what it's doing. Please take a look at the screenshot and log below. Right around 4000rpm you can see lambda control dip causing a lean mixture then it jumps back up and goes way rich and just seems unresponsive for most of this short pull. I've got many logs just like this one too if more are needed.
018CH ECU/B5 A4. I didn't have (or notice) this issue before going to my new turbo setup, not sure how that would affect anything though.
Any ideas?
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Logged
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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SB_GLI
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« Reply #1 on: January 26, 2018, 06:14:08 PM »
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Ps_w cap?
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amd is the best
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« Reply #2 on: January 26, 2018, 06:36:26 PM »
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I have performed the 5120 hack which I thought doubled that cap but I very well could be incorrect on that or it’s possible that I didn’t perform the hack correctly...
I am currently running without a maf as well however it does it with or without the maf attached.
This log is also super low load. Could it still hit the cap?
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Logged
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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amd is the best
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« Reply #3 on: January 26, 2018, 08:09:50 PM »
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Just looked at PS_W and it’s definitely not right from what I am reading. It’s oscillating all over the place, not sure where to go from here. Thank you for likely pointing me in a right direction.
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Logged
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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amd is the best
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« Reply #4 on: January 26, 2018, 09:36:13 PM »
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Any input on this?
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Logged
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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nyet
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« Reply #5 on: January 26, 2018, 11:45:10 PM »
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Uh. MAF?
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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amd is the best
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« Reply #6 on: January 27, 2018, 05:42:51 AM »
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Same result with or without the maf.
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Logged
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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amd is the best
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« Reply #7 on: January 27, 2018, 08:07:44 AM »
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Today I completed reverted my 5120 and swapped in the oem map sensor and ps_w looks the same. So I don’t believe it was my 5120 changes.
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Logged
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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nyet
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« Reply #8 on: January 27, 2018, 09:50:18 AM »
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No, look at your MAF values.
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Logged
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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amd is the best
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« Reply #9 on: January 27, 2018, 10:08:16 AM »
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My MAF values are 0. There is no MAF however the results are identical with or without it.
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Logged
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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amd is the best
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« Reply #10 on: January 27, 2018, 10:16:16 AM »
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Graph with MAF attached.
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Logged
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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nyet
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« Reply #11 on: January 27, 2018, 04:04:43 PM »
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Not sure why you expect anything to run properly MAFless unless you run real speed density.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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amd is the best
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« Reply #12 on: January 27, 2018, 04:57:07 PM »
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As mentioned above, this issue exists with or without the MAF being present. So pretend I never said anything about temporarily being mafless, look at the above chart which clearly includes a MAF AND a clear issue with ps_w and base your advice on that. If you have no other input, thank you for your time and hopefully someone else can chime in with some direction.
I am working on trying to find a location suitable for my MAF in an extremely tight area. It is the only reason the car is currently running without it. I have to choose no maf or no filter at the moment and the filter wins over the MAF. Not that I need to justify my actions.
Some other background about this car, if it’s helpful.
2000 A4 ATW, wideband converted with a 2001 018CH ECU, no vvt, no cat, no evap, big turbo (S200SXE 7070), 5120, RS4 MAF, 870cc injectors, 2.0t coils,
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« Last Edit: January 27, 2018, 08:00:54 PM by amd is the best »
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2012 Golf TDI
2001 Audi A4 2.8 30v Supercharged
1991 Audi 200 20v
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nyet
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« Reply #13 on: January 28, 2018, 01:08:32 AM »
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Please post the log with working MAF.
Trace the ps_w calc and log whatever you can in the path.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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nyet
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« Reply #14 on: January 28, 2018, 01:13:34 AM »
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I have the feeling something is wrong with your 5120 hack. Perhaps some signed vs unsigned boundary condition near 0x7fff - 0x8000
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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