Title: Disabling VVT Post by: masterj on January 28, 2015, 06:13:36 AM I've read few topics here that recommend only disabling diagnostics of VVT. But for complete disable I think we also need b_nws = 0, no?
Currently I have fixed ESKONF and CDNWS = 0. Title: Re: Disabling VVT Post by: littco on January 29, 2015, 02:17:59 AM I've read few topics here that recommend only disabling diagnostics of VVT. But for complete disable I think we also need b_nws = 0, no? Currently I have fixed ESKONF and CDNWS = 0. if you resistor out or leave just the vvt solenoid plugged in ( not the whole vvt, just actual solenoid) then you only need to set CDNWS 0..but I also set all the wse maps to 18 as well.. Title: Re: Disabling VVT Post by: masterj on January 29, 2015, 09:54:19 AM I'll try to analize fr cause I think that there has to be easier and more "correct" way than setting all *WSE maps to 18 or -4 :)
Title: Re: Disabling VVT Post by: masterj on January 29, 2015, 10:24:11 AM After some digging into FR I propose this:
disable b_nws by TMNW = FF properly set camshaft reference value in WNWREO Additionally disable diagnostics by ESKONF and CDNWS. Whatcha think? Title: Re: Disabling VVT Post by: ddillenger on January 29, 2015, 10:54:42 AM After some digging into FR I propose this: disable b_nws by TMNW = FF properly set camshaft reference value in WNWREO Additionally disable diagnostics by ESKONF and CDNWS. Whatcha think? I think you should just use CDNWS/ESKONF and unplug the solenoid. Title: Re: Disabling VVT Post by: masterj on January 29, 2015, 12:10:41 PM I think you should just use CDNWS/ESKONF and unplug the solenoid. And CDNWS will set b_nws = 0? Because if not then I think it will still switch between ignition maps or am I wrong? Title: Re: Disabling VVT Post by: prj on January 29, 2015, 11:46:52 PM Switching between ignition maps is done by actual camshaft position.
If the cams are not moving, fnwue is 0 and there is no switching. Title: Re: Disabling VVT Post by: masterj on January 30, 2015, 01:33:09 AM Switching between ignition maps is done by actual camshaft position. If the cams are not moving, fnwue is 0 and there is no switching. oh, ok. So basically ecu will think it is not switching from -4 to 18 advancement. Got it :) Thanks Title: Re: Disabling VVT Post by: masterj on January 31, 2015, 07:02:47 AM One more question:
When VVT is not present camshaft is in advanced (18) or in retarded (-4) position? For example for AGU or AEB should I set up whole changeover map to -4 or 18? (to use only one variation of ignition map KFZW) Title: Re: Disabling VVT Post by: MadCow on January 31, 2015, 09:53:48 AM I forget which position is the default, but when I tried setting all the values the same the ECU never went through the OBD2 readiness tests and there were some fuel trim issues (forget exactly what). I changed ESKONF and CDNWS and copied the KFZW* maps over to KFZW*2 and it everything seemed fine after that.
Title: Re: Disabling VVT Post by: masterj on January 31, 2015, 11:44:34 AM I forget which position is the default, but when I tried setting all the values the same the ECU never went through the OBD2 readiness tests and there were some fuel trim issues (forget exactly what). I changed ESKONF and CDNWS and copied the KFZW* maps over to KFZW*2 and it everything seemed fine after that. If you copied from kfzw to kfzw then i think default is advanced... Title: Re: Disabling VVT Post by: ddillenger on January 31, 2015, 11:54:09 AM One more question: When VVT is not present camshaft is in advanced (18) or in retarded (-4) position? For example for AGU or AEB should I set up whole changeover map to -4 or 18? (to use only one variation of ignition map KFZW) VVT advances the camshaft by 22 degrees. Title: Re: Disabling VVT Post by: masterj on January 31, 2015, 03:54:17 PM VVT advances the camshaft by 22 degrees. Yes, between -4 and 18 degrees (shown in various maps). So basically in "default" position it is -4, right? Just need confirmation to close this topic :) Title: Re: Disabling VVT Post by: ddillenger on January 31, 2015, 04:03:00 PM Yes, between -4 and 18 degrees (shown in various maps). So basically in "default" position it is -4, right? Just need confirmation to close this topic :) 18 represents at rest in the 1.8t files from what I recall. Title: Re: Disabling VVT Post by: masterj on January 31, 2015, 04:08:55 PM 18 represents at rest in the 1.8t files from what I recall. So advancement is done backwards... OK, so if "default" (retarded) position is 18 then advanced will be -4. Weird compared to ignition where advancement is done by increasing number and retard by decreasing. Title: Re: Disabling VVT Post by: Lost on February 01, 2015, 12:30:42 AM So advancement is done backwards... OK, so if "default" (retarded) position is 18 then advanced will be -4. Weird compared to ignition where advancement is done by increasing number and retard by decreasing. It is based on which side the cam is turning when retarded or advanced Title: Re: Disabling VVT Post by: ddillenger on February 01, 2015, 01:06:29 AM From what I've seen:
All wideband ME7.5: 18=at rest, -4=advanced BEL: 14=at rest, -8=advanced APB: 0=at rest, 1=advanced AWN (note, NOT AWM!): 0=at rest, 11=transitional, 22=advanced. They are all different-lol. Keep in mind, this is all from memory, so I may be mistaken. Title: Re: Disabling VVT Post by: masterj on February 02, 2015, 01:21:04 AM From what I've seen: All wideband ME7.5: 18=at rest, -4=advanced BEL: 14=at rest, -8=advanced APB: 0=at rest, 1=advanced AWN (note, NOT AWM!): 0=at rest, 11=transitional, 22=advanced. They are all different-lol. Keep in mind, this is all from memory, so I may be mistaken. Well i guess if im using ME7.5 for AGU engine, I'll just keep 18 then :) Thanks for the info Title: Re: Disabling VVT Post by: julex on February 03, 2015, 08:42:27 AM That would be backwards from all the other boxes them. On ME 7.1, advanced in "1", at rest (retarded) is 0
In Me 7.1.1 and RS4 it is "22" for advanced, 0 at rest. Basically whatever you see in low load, low rpm, is value that is at rest. The VVT only kicks in mid-high low in low-mid rpms and is very obvious when you look at the map. Title: Re: Disabling VVT Post by: masterj on February 03, 2015, 11:19:42 PM That would be backwards from all the other boxes them. On ME 7.1, advanced in "1", at rest (retarded) is 0 In Me 7.1.1 and RS4 it is "22" for advanced, 0 at rest. Basically whatever you see in low load, low rpm, is value that is at rest. The VVT only kicks in mid-high low in low-mid rpms and is very obvious when you look at the map. I see 18s almost in whole cam changeover table, only around where boost reaches max it is -4. So I guess it really is 18 (retarded) and -4 (advanced) Title: Re: Disabling VVT Post by: ddillenger on February 04, 2015, 12:27:50 AM I see 18s almost in whole cam changeover table, only around where boost reaches max it is -4. So I guess it really is 18 (retarded) and -4 (advanced) I told you it was. That has not changed. Title: Re: Disabling VVT Post by: masterj on February 04, 2015, 11:17:06 AM I told you it was. That has not changed. yes you were right :) thank you guys for all the answers :) Title: Re: Disabling VVT Post by: prj on February 14, 2015, 07:59:46 PM All this is not important. Log fnwue, if it is 0, then KFZW is read, if it is 1 then KFZW2.
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