New DA2 definition file changes. What are these fields?
Thread Starter
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
New DA2 definition file changes. What are these fields?
I'll soon be getting my new DA2 definition file from TunerCAT. My old file was from 2002 so there have been a few changes since then. In looking at the PDF file here are the changes that jump out at me.
Left/Right O2 Sensor Diagnostic
Left/Right O2 Sensor Lean Diag
Left/Right O2 Sensor Rich Diag
These are pretty self explanatory as they are just switch parameters, fair enough. For the most part it's pretty self explanatory, there are just a few fields that I find particularly interesting that were never in the old definition. I was hoping some of the more knowledgable people could shed some light on the following
Throttle Follow Extend Decay Timer (Drive)
Throttle Follow Extend Decay Timer (P/N)
Throttle Follow Extend Deay Timer Adder
Fast O2 Rich/Lean Thershold Hysteresis
IAC Defaualt Keep Alive Min Position
IAC Minimum Keep Alive Min Position
IAC Maximum Keep Alive Min Position
DFCO Enable/Disable RPM Threshold
DFCO Enable/Disable MAP Threshold
DFCO Disable RPM Decrease Threshold
DFCO Enable COolant Temp Threshold
DFCO Enable TPS Threshold Hysteresis
Instrument Panel VSS Pulse Divisor
I guess my biggest question is what the crap is a DFCO!?
Left/Right O2 Sensor Diagnostic
Left/Right O2 Sensor Lean Diag
Left/Right O2 Sensor Rich Diag
These are pretty self explanatory as they are just switch parameters, fair enough. For the most part it's pretty self explanatory, there are just a few fields that I find particularly interesting that were never in the old definition. I was hoping some of the more knowledgable people could shed some light on the following
Throttle Follow Extend Decay Timer (Drive)
Throttle Follow Extend Decay Timer (P/N)
Throttle Follow Extend Deay Timer Adder
Fast O2 Rich/Lean Thershold Hysteresis
IAC Defaualt Keep Alive Min Position
IAC Minimum Keep Alive Min Position
IAC Maximum Keep Alive Min Position
DFCO Enable/Disable RPM Threshold
DFCO Enable/Disable MAP Threshold
DFCO Disable RPM Decrease Threshold
DFCO Enable COolant Temp Threshold
DFCO Enable TPS Threshold Hysteresis
Instrument Panel VSS Pulse Divisor
I guess my biggest question is what the crap is a DFCO!?
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by Nathan Plemons
I'll soon be getting my new DA2 definition file from TunerCAT. My old file was from 2002 so there have been a few changes since then. In looking at the PDF file here are the changes that jump out at me.
Left/Right O2 Sensor Diagnostic
Left/Right O2 Sensor Lean Diag
Left/Right O2 Sensor Rich Diag
These are pretty self explanatory as they are just switch parameters, fair enough. For the most part it's pretty self explanatory, there are just a few fields that I find particularly interesting that were never in the old definition. I was hoping some of the more knowledgable people could shed some light on the following
Throttle Follow Extend Decay Timer (Drive)
Throttle Follow Extend Decay Timer (P/N)
Throttle Follow Extend Deay Timer Adder
Fast O2 Rich/Lean Thershold Hysteresis
IAC Defaualt Keep Alive Min Position
IAC Minimum Keep Alive Min Position
IAC Maximum Keep Alive Min Position
DFCO Enable/Disable RPM Threshold
DFCO Enable/Disable MAP Threshold
DFCO Disable RPM Decrease Threshold
DFCO Enable COolant Temp Threshold
DFCO Enable TPS Threshold Hysteresis
Instrument Panel VSS Pulse Divisor
I guess my biggest question is what the crap is a DFCO!?
Left/Right O2 Sensor Diagnostic
Left/Right O2 Sensor Lean Diag
Left/Right O2 Sensor Rich Diag
These are pretty self explanatory as they are just switch parameters, fair enough. For the most part it's pretty self explanatory, there are just a few fields that I find particularly interesting that were never in the old definition. I was hoping some of the more knowledgable people could shed some light on the following
Throttle Follow Extend Decay Timer (Drive)
Throttle Follow Extend Decay Timer (P/N)
Throttle Follow Extend Deay Timer Adder
Fast O2 Rich/Lean Thershold Hysteresis
IAC Defaualt Keep Alive Min Position
IAC Minimum Keep Alive Min Position
IAC Maximum Keep Alive Min Position
DFCO Enable/Disable RPM Threshold
DFCO Enable/Disable MAP Threshold
DFCO Disable RPM Decrease Threshold
DFCO Enable COolant Temp Threshold
DFCO Enable TPS Threshold Hysteresis
Instrument Panel VSS Pulse Divisor
I guess my biggest question is what the crap is a DFCO!?
Now I bet that makes more sense to you Nathan by the way I use to live in Owensboro I put in a paper machine in the Willamette Paper mill in Hawesville several years ago. Its not Willamette any more cuz they got bought out by Weyerhauser.
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
If you do a datalog on the highway.. get off the gas (let it engine brake) and watch the pulse width go to 000 than thats DFCO.
You shouldn't have to play with those settings on most cars. Some of them are bad though.. I had to take it off a friends stock car because he said in the snow it would cause the back to loose traction a bit.
You shouldn't have to play with those settings on most cars. Some of them are bad though.. I had to take it off a friends stock car because he said in the snow it would cause the back to loose traction a bit.
Thread Starter
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Hmm, I've had a slight issue for a while with mine. If I downshift and let the engine do the braking for me and let it drag down pretty good sometimes it'll act like the revs want to drop just a hair too much when I finally do get on the clutch. To date it has never stalled but you can see it happen. Maybe a little tweaking here could help that.
What about the throttle follow stuff?
What about the throttle follow stuff?
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
usually the biggest complaint about dfco that i've heard is sometimes *sometimes* it feels too much like a jake brake
Throttle follower is what keeps the r's up between shifts.. Also keeps them up a bit as you come to a stop.
Throttle follower is what keeps the r's up between shifts.. Also keeps them up a bit as you come to a stop.
Thread Starter
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Originally Posted by Alvin
Throttle follower is what keeps the r's up between shifts.. Also keeps them up a bit as you come to a stop.
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
Yeah if you email john (tc@tunercat.com) and give him your name he will send you the updated versions of all the def that you have bought. there has also been significant program updates since then.
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Thread Starter
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Well I got my definitions yesterday. I didn't have much time to look but I did open it up for a quick glance. I notice there are a few tables dealing with O2 sensors that reference MAF values. The 92 is speed density, are these tables just ignored or what?
