SD tuning problem
Feb 7, 2006 | 05:52 PM
#1
SD tuning problem
http://hptuners.com/forum/showthread...0074#post30074
I don't know what exactly is happening here but my AFR error is a solid 15 everywhere and it doesn't seem to change.
At idle my O2s are sky rocketing and its running rich as hell. They just go solid and do not ocilate when I'm at a stop light.
I followed everything in the How to SD tune via WB from the HPT help files.
I did a SD tune not long ago before I went to get my dyno tune done and it wasn't that bad.
I don't know what exactly is happening here but my AFR error is a solid 15 everywhere and it doesn't seem to change.
At idle my O2s are sky rocketing and its running rich as hell. They just go solid and do not ocilate when I'm at a stop light.
I followed everything in the How to SD tune via WB from the HPT help files.
I did a SD tune not long ago before I went to get my dyno tune done and it wasn't that bad.
Feb 7, 2006 | 10:42 PM
#4
hey zick - took a look at your tune and noticed a couple of things.
for the rich idle the VE values in the 400/800/1200 really need to be reduced to compensate for the inefficiency of your cam in these rpm/map areas. IMHO i would return the VE to stock and reduce the 400/800/1200 columns by 20/20/10 for starters. this should help alot.
you are seeing the 15.0:1 AFR from the OLFA Table being set to 1.00 for all cells. with the PE Multi vs RPM set to 1.12988 and the PE Enable vs TPS vs RPM set to 70 across the board, it appears you trying to tune the VE @ 13.0:1? with this setting you will not get to 13.0:1 until 70% TPS. if you are trying to tune at 13:1, it would probably be less complicated with the OLFA set to 1.12988 for the 13:1 and the PE Multi vs RPM to 1.00. This will command an AFR of 13:1 from start up. change the PE Enable vs TPS vs RPM to 90+ and you won't have to worry about WOT routines kicking in and possibly skewing your numbers.
are you trying to tune open or closed loop? your o2's are oscillating as if you were in closed loop. i found it easier to command open loop from the bi-directional controls. this way you are assured open loop which can be verified with the o2's flat lined.
let me know if this helps.
for the rich idle the VE values in the 400/800/1200 really need to be reduced to compensate for the inefficiency of your cam in these rpm/map areas. IMHO i would return the VE to stock and reduce the 400/800/1200 columns by 20/20/10 for starters. this should help alot.
you are seeing the 15.0:1 AFR from the OLFA Table being set to 1.00 for all cells. with the PE Multi vs RPM set to 1.12988 and the PE Enable vs TPS vs RPM set to 70 across the board, it appears you trying to tune the VE @ 13.0:1? with this setting you will not get to 13.0:1 until 70% TPS. if you are trying to tune at 13:1, it would probably be less complicated with the OLFA set to 1.12988 for the 13:1 and the PE Multi vs RPM to 1.00. This will command an AFR of 13:1 from start up. change the PE Enable vs TPS vs RPM to 90+ and you won't have to worry about WOT routines kicking in and possibly skewing your numbers.
are you trying to tune open or closed loop? your o2's are oscillating as if you were in closed loop. i found it easier to command open loop from the bi-directional controls. this way you are assured open loop which can be verified with the o2's flat lined.
let me know if this helps.
Feb 7, 2006 | 10:50 PM
#5
Originally Posted by Okie5.3
hey zick - took a look at your tune and noticed a couple of things.
for the rich idle the VE values in the 400/800/1200 really need to be reduced to compensate for the inefficiency of your cam in these rpm/map areas. IMHO i would return the VE to stock and reduce the 400/800/1200 columns by 20/20/10 for starters. this should help alot.
you are seeing the 15.0:1 AFR from the OLFA Table being set to 1.00 for all cells. with the PE Multi vs RPM set to 1.12988 and the PE Enable vs TPS vs RPM set to 70 across the board, it appears you trying to tune the VE @ 13.0:1? with this setting you will not get to 13.0:1 until 70% TPS. if you are trying to tune at 13:1, it would probably be less complicated with the OLFA set to 1.12988 for the 13:1 and the PE Multi vs RPM to 1.00. This will command an AFR of 13:1 from start up. change the PE Enable vs TPS vs RPM to 90+ and you won't have to worry about WOT routines kicking in and possibly skewing your numbers.
are you trying to tune open or closed loop? your o2's are oscillating as if you were in closed loop. i found it easier to command open loop from the bi-directional controls. this way you are assured open loop which can be verified with the o2's flat lined.
let me know if this helps.
for the rich idle the VE values in the 400/800/1200 really need to be reduced to compensate for the inefficiency of your cam in these rpm/map areas. IMHO i would return the VE to stock and reduce the 400/800/1200 columns by 20/20/10 for starters. this should help alot.
you are seeing the 15.0:1 AFR from the OLFA Table being set to 1.00 for all cells. with the PE Multi vs RPM set to 1.12988 and the PE Enable vs TPS vs RPM set to 70 across the board, it appears you trying to tune the VE @ 13.0:1? with this setting you will not get to 13.0:1 until 70% TPS. if you are trying to tune at 13:1, it would probably be less complicated with the OLFA set to 1.12988 for the 13:1 and the PE Multi vs RPM to 1.00. This will command an AFR of 13:1 from start up. change the PE Enable vs TPS vs RPM to 90+ and you won't have to worry about WOT routines kicking in and possibly skewing your numbers.
are you trying to tune open or closed loop? your o2's are oscillating as if you were in closed loop. i found it easier to command open loop from the bi-directional controls. this way you are assured open loop which can be verified with the o2's flat lined.
let me know if this helps.
I'm using the step by step document found in the help files on HPT called "Speed Density Tuning using Wideband O2 Input"
Everything is set exactly how it says it should be. But I've seen other write ups describing basically the same thing your saying.
One thing, I'm not seeing 15 AFR, its reading 15 for the AFR error %.
UPDATE:
Originally Posted by soundengineer
he's got open loop stft going on...
it will be in a future download update...
for a quick fix....
in the scanner yo need to use vcm controls to turn off closed loop...
this will fully disable stft in open loop as well
it will be in a future download update...
for a quick fix....
in the scanner yo need to use vcm controls to turn off closed loop...
this will fully disable stft in open loop as well
Feb 7, 2006 | 11:07 PM
#6
One thing, I'm not seeing 15 AFR, its reading 15 for the AFR error %.
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