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julex
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« Reply #45 on: January 16, 2013, 07:11:14 AM »
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Thanks. I had them mixed up then. I always though CPS = Crankshaft Position Sensor... makes sense when you look at acronym and full name, no?
Anyway, I did some more logging and I am getting erratic RPMs all over the place but mostly visible and detectable when constantly accelerating as the RPMs should not fluctuate like this (see attachments). This is full pull from 2k to 7k with very little torque initially so I can safely eliminate clutch slip. I conditionally formatted RPM column to show in green proper RPM increase over previous cell and in red where RPM readout show less...
I am getting replacement CKP today, original Audi bosch so we will see where we are after this.
The only other variables left on the table are:
- clutch tone disc
- TDI tranny which might have different spacing of CKP sensor from tone ring than normal S4/A6/allroad tranny...
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prj
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« Reply #46 on: January 16, 2013, 07:17:10 AM »
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Which coils are you using?
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julex
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« Reply #47 on: January 16, 2013, 08:13:53 AM »
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2.0 fsi conversion and before you ask... yes ground is coming from ECU (or wherever it is coming from on original ECM module feed), not bolted to common ground on head... I will put this down as possible culprit.
Edit: I looked at electrical diagrams and in stock mode both grounds are coming from the same ground location on firewall... so I doubt it is the ground itself.
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« Last Edit: January 16, 2013, 08:41:00 AM by julex »
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phila_dot
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« Reply #48 on: January 16, 2013, 08:53:12 AM »
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Can you post the whole log?
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julex
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« Reply #49 on: January 16, 2013, 09:10:20 AM »
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Can you post the whole log?
Here you go. TMAR = 143 on this run though as I am sick of ARMD playing yo-yo with my timing. Pull starts at row 544. |
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nyet
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« Reply #50 on: January 16, 2013, 10:01:03 AM »
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Wow your RPM data really is a mess  Do your zeitronix logs show the same lumpy rpm? |
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« Last Edit: January 16, 2013, 10:17:13 AM by nyet »
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julex
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« Reply #51 on: January 16, 2013, 10:28:29 AM »
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Wow your RPM data really is a mess Do your zeitronix logs show the same lumpy rpm? Yup. Since ECU feeds cluster with pulses, the same variability is visible albeit zeitronix is not as accurate in sampling as NMOT_W. |
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prj
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« Reply #52 on: January 17, 2013, 05:25:15 AM »
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2.0 fsi conversion and before you ask... yes ground is coming from ECU (or wherever it is coming from on original ECM module feed), not bolted to common ground on head... I will put this down as possible culprit. And who is the manufacturer of the coils? |
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julex
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« Reply #53 on: January 17, 2013, 06:07:52 AM »
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ELDOR or something like that. Supposedly original audi/vw coils.
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aef
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« Reply #54 on: January 17, 2013, 06:59:42 AM »
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What about your coilpack harness, is it the very first with old black corroded?
Maybe it will help to redo the wiring all the way back into the ecu.
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julex
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« Reply #55 on: January 17, 2013, 10:42:03 AM »
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The wires themselves are pristine and crimping job is very nice with enviro seal butt crimps.
I have a feeling pjr is on the right track. My home made coil hookup is sharing grounds which would naturally route the coil side through common ground... I will redo one side and see if the rpm fluctuations subside.
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« Last Edit: January 17, 2013, 10:52:55 AM by julex »
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julex
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« Reply #56 on: January 17, 2013, 11:16:18 AM »
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Wow your RPM data really is a mess Do your zeitronix logs show the same lumpy rpm? I have a small bone to pick with you  . I was trying to use EcuX to graph my RPM fluctuations but failed. I attached a screenshot I concocted. .CSV file I am using with RPM data is not properly, e.g. value to value, displayed in EcuX. The RPM data points I am trying to graph are instead some averaged (I think) values. This hides the jumping RPMs which I am interested to see. I am specifically looking for that 6446 rpm data point which is lower than previous data point, which is not showed on graph. Is this due to EcuX Plot interpolating data? Can this interpolation/filtering/averaging be disabled as an option? Thanks. |
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nyet
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« Reply #57 on: January 17, 2013, 12:30:16 PM »
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Julex: yes, by default the RPM signal is filtered. I have a build where I have an unfiltered RPM, but i didn't release it you can pull the sources and build your own if you want, since i did push the changes to the repo. I have some cosmetic things i need to fix before I make it formal. |
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julex
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« Reply #58 on: January 17, 2013, 12:53:26 PM »
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Julex: yes, by default the RPM signal is filtered. I have a build where I have an unfiltered RPM, but i didn't release it you can pull the sources and build your own if you want, since i did push the changes to the repo. I have some cosmetic things i need to fix before I make it formal. Cool, no rush on this side. I just wanted to report this as possible change for the future. I have to use excel anyway for conditional formatting and nice colors for cells to see trouble areas. Thanks. |
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prj
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« Reply #59 on: January 17, 2013, 12:59:00 PM »
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ELDOR or something like that. Supposedly original audi/vw coils. Original are Bosch. Change the coils to Bosch or Beru and your problem should disappear. BTDT. |
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