Tephra v7 9653 thottle hang
I changed my decel fuel tables all to equal the least valued one. I think it was 2 and 4 had the least values, so I copied/pated to tables 1 and 3. Maybe I should bring them down a little more?
Evolving Member
Joined: Dec 2005
Posts: 261
Likes: 2
From: Silverdale,WA
Zeroing out the two ISCV Demand tables kinda helped, but if i go about 10 psi part throttle and let off at 5500-6000 rpm then it will still hang. Its not NEAR as bad as it was this morning. It would hang so bad if it left it in gear and let off it would keep driving (in boost!) for a few seconds. Very dangerous! But its a little better and i can just adjust my driving style to correct for this.
Does running something other than the factory ECU cure this? I've been thinking of moving to an Apexi Power-FC. I used on on my FD, and I liked it quite a bit.
As for my experiences with throttle hang, I just had my car tuned for SD last Friday. It's a bolt on (tbe, intake, 3.5" fmic, walbro 255, blitz sbc id spec r boost controller) '06 MR, and when I WOT through the gears, it hangs bad, and climbs a few hundred RPM, also causing almost complete gear lockout (didn't lockout before, not near as bad).
Another thing that I think is related is BOV flutter. It would make sense for the throttle body area to be experiencing odd fluctuations of vacuum/boost at part throttle in-boost situations if the ISV is open too far. As a reference for that theory, I'm using a HKS SSQV.
As for my experiences with throttle hang, I just had my car tuned for SD last Friday. It's a bolt on (tbe, intake, 3.5" fmic, walbro 255, blitz sbc id spec r boost controller) '06 MR, and when I WOT through the gears, it hangs bad, and climbs a few hundred RPM, also causing almost complete gear lockout (didn't lockout before, not near as bad).
Another thing that I think is related is BOV flutter. It would make sense for the throttle body area to be experiencing odd fluctuations of vacuum/boost at part throttle in-boost situations if the ISV is open too far. As a reference for that theory, I'm using a HKS SSQV.
Evolved Member
Joined: May 2009
Posts: 522
Likes: 2
From: mnt vernon ny
this realy realy helped a lot actualy helped my idle a little bit as well by setting the two iscv tables to 0.0 . ow the car has a problem when the power steering is on all the way the cars rpm drops and the if i rev to park it shut off(stalls) any idea? btw my idle is set to 750 but hangs at 950 to 1000, drops to about 400-500 when streering is in full lock. thnx.
I found that adjusting the Decel Fuel Cut Delay tables to make them match my stock rom (941700015) eliminated the throttle hang.
My theory was as follows....
The Decel Fuel Cut Delay tables give a time poriod of holding fuel when the car is in neutral or coasting. When the car is started the rpm raised momemtairly and then wants to return to idle but the delay tables have not timed out yet. Thus the throttle hang. As we all noticed the hang does slowly go back to mormal after a short time.
By lowering the values the car is more rapidly returing to idle.
You will see what I mean when you compare the v7 delay tables to the stock rom tables.
Also the ISCV tables need to be made to match the stock rom as well.
Yet another couple tweeks that help idle and throttle transitions is....
Idle Stability Timing Control.....set the sensitivity to 146
For those that stall with the A/C on.....the Idle Error - A/C On table should be adjusted to count up from 0 to 8. (change the series of 4s to count up incrementally)
A final piece of the puzzle is the periphery bits. It seems that disabeling some causes adverse conditions in other areas. I tested a lot of various stock rom settings into the v7 and came up with a solution that has solved my cold start/idle/hang issues.
See my post.....https://www.evolutionm.net/forums/ec...-searched.html
It seems that our "universal" rom need some specific stock rom settings to cure common issues.
My theory was as follows....
The Decel Fuel Cut Delay tables give a time poriod of holding fuel when the car is in neutral or coasting. When the car is started the rpm raised momemtairly and then wants to return to idle but the delay tables have not timed out yet. Thus the throttle hang. As we all noticed the hang does slowly go back to mormal after a short time.
By lowering the values the car is more rapidly returing to idle.
You will see what I mean when you compare the v7 delay tables to the stock rom tables.
Also the ISCV tables need to be made to match the stock rom as well.
Yet another couple tweeks that help idle and throttle transitions is....
Idle Stability Timing Control.....set the sensitivity to 146
For those that stall with the A/C on.....the Idle Error - A/C On table should be adjusted to count up from 0 to 8. (change the series of 4s to count up incrementally)
A final piece of the puzzle is the periphery bits. It seems that disabeling some causes adverse conditions in other areas. I tested a lot of various stock rom settings into the v7 and came up with a solution that has solved my cold start/idle/hang issues.
See my post.....https://www.evolutionm.net/forums/ec...-searched.html
It seems that our "universal" rom need some specific stock rom settings to cure common issues.
Ask and you shal be given........
If those are hard to read here is the link....
http://i480.photobucket.com/albums/r...d/Picture1.png
If those are hard to read here is the link....
http://i480.photobucket.com/albums/r...d/Picture1.png
Newbie
Joined: Jun 2009
Posts: 18
Likes: 0
From: Australia
I have been told that its a emissions control problem. when you press on the clutch it automatically increases the rpm to burn any unused fuel. By disconnecting the clutch switch it the hang issue is apparently solved.has anyone tried this?
Evolved Member
Joined: May 2009
Posts: 522
Likes: 2
From: mnt vernon ny
I found that adjusting the Decel Fuel Cut Delay tables to make them match my stock rom (941700015) eliminated the throttle hang.
My theory was as follows....
The Decel Fuel Cut Delay tables give a time poriod of holding fuel when the car is in neutral or coasting. When the car is started the rpm raised momemtairly and then wants to return to idle but the delay tables have not timed out yet. Thus the throttle hang. As we all noticed the hang does slowly go back to mormal after a short time.
By lowering the values the car is more rapidly returing to idle.
You will see what I mean when you compare the v7 delay tables to the stock rom tables.
Also the ISCV tables need to be made to match the stock rom as well.
Yet another couple tweeks that help idle and throttle transitions is....
Idle Stability Timing Control.....set the sensitivity to 146
For those that stall with the A/C on.....the Idle Error - A/C On table should be adjusted to count up from 0 to 8. (change the series of 4s to count up incrementally)
My theory was as follows....
The Decel Fuel Cut Delay tables give a time poriod of holding fuel when the car is in neutral or coasting. When the car is started the rpm raised momemtairly and then wants to return to idle but the delay tables have not timed out yet. Thus the throttle hang. As we all noticed the hang does slowly go back to mormal after a short time.
By lowering the values the car is more rapidly returing to idle.
You will see what I mean when you compare the v7 delay tables to the stock rom tables.
Also the ISCV tables need to be made to match the stock rom as well.
Yet another couple tweeks that help idle and throttle transitions is....
Idle Stability Timing Control.....set the sensitivity to 146
For those that stall with the A/C on.....the Idle Error - A/C On table should be adjusted to count up from 0 to 8. (change the series of 4s to count up incrementally)
2. what is the xml for the idle stability control for v7?
3. what is the idle error a/c xml for v7 or what is it called ?
4. have you found a table that relates to the p/s iscv?
to add to #4 i was warming my car up this morning leaving work and i noticed when i locked the steering wheel it didnt bog suck that i didnt have my laptop with me but do you think if i set the iscv value that its using right there at low temp to match high/operating temp it will no bog/stall when power steering is being used?
1. the v7 rom has 4 decel cut fuel delays which one?
2. what is the xml for the idle stability control for v7?
3. what is the idle error a/c xml for v7 or what is it called ?
4. have you found a table that relates to the p/s iscv?
to add to #4 i was warming my car up this morning leaving work and i noticed when i locked the steering wheel it didnt bog suck that i didnt have my laptop with me but do you think if i set the iscv value that its using right there at low temp to match high/operating temp it will no bog/stall when power steering is being used?
2. what is the xml for the idle stability control for v7?
3. what is the idle error a/c xml for v7 or what is it called ?
4. have you found a table that relates to the p/s iscv?
to add to #4 i was warming my car up this morning leaving work and i noticed when i locked the steering wheel it didnt bog suck that i didnt have my laptop with me but do you think if i set the iscv value that its using right there at low temp to match high/operating temp it will no bog/stall when power steering is being used?
2. Idle Stability Timing Control
<table name="Idle Stability Timing Control" category="Idle" address="174e" type="2D" level="2" scaling="uint16">
<table name="Settings" type="Static X Axis" elements="3">
<data>Sensitivity</data>
<data>Timing Limit</data>
<data>Untested</data>
</table>
</table>
3. Idle Error Tables
<table name="Idle Error - Normal" category="Idle" address="435c" type="2D" level="2" scaling="ISCVSteps">
<table name="Idle Error" address="669a" type="X Axis" elements="9" scaling="RPM"/>
</table>
<table name="Idle Error - A/C On" category="Idle" address="436c" type="2D" level="2" scaling="ISCVSteps">
<table name="Idle Error" address="669a" type="X Axis" elements="9" scaling="RPM"/>
</table>
4. I have not experienced what you are seeing with the power steering. Make sure that Periphery FEA is all 0s. There is one periphery in there that calls for P/S but I am told that the version of rom we are using for v7 does not call any bits in FEA so they can all be 0.
Another little tidbit of info. The OBD Inspection section we need to make sure that we do not enable the Secondary Air System. USDM cars do not have this feature so make it unavailable and disabled. Not sure if this is a contributor to the OP, but it is worth a try.
Evolved Member
Joined: May 2009
Posts: 522
Likes: 2
From: mnt vernon ny
1. All 4 of them need to match the stock 9417 rom. See my picture above.
2. Idle Stability Timing Control
<table name="Idle Stability Timing Control" category="Idle" address="174e" type="2D" level="2" scaling="uint16">
<table name="Settings" type="Static X Axis" elements="3">
<data>Sensitivity</data>
<data>Timing Limit</data>
<data>Untested</data>
</table>
</table>
3. Idle Error Tables
<table name="Idle Error - Normal" category="Idle" address="435c" type="2D" level="2" scaling="ISCVSteps">
<table name="Idle Error" address="669a" type="X Axis" elements="9" scaling="RPM"/>
</table>
<table name="Idle Error - A/C On" category="Idle" address="436c" type="2D" level="2" scaling="ISCVSteps">
<table name="Idle Error" address="669a" type="X Axis" elements="9" scaling="RPM"/>
</table>
4. I have not experienced what you are seeing with the power steering. Make sure that Periphery FEA is all 0s. There is one periphery in there that calls for P/S but I am told that the version of rom we are using for v7 does not call any bits in FEA so they can all be 0.
Another little tidbit of info. The OBD Inspection section we need to make sure that we do not enable the Secondary Air System. USDM cars do not have this feature so make it unavailable and disabled. Not sure if this is a contributor to the OP, but it is worth a try.
2. Idle Stability Timing Control
<table name="Idle Stability Timing Control" category="Idle" address="174e" type="2D" level="2" scaling="uint16">
<table name="Settings" type="Static X Axis" elements="3">
<data>Sensitivity</data>
<data>Timing Limit</data>
<data>Untested</data>
</table>
</table>
3. Idle Error Tables
<table name="Idle Error - Normal" category="Idle" address="435c" type="2D" level="2" scaling="ISCVSteps">
<table name="Idle Error" address="669a" type="X Axis" elements="9" scaling="RPM"/>
</table>
<table name="Idle Error - A/C On" category="Idle" address="436c" type="2D" level="2" scaling="ISCVSteps">
<table name="Idle Error" address="669a" type="X Axis" elements="9" scaling="RPM"/>
</table>
4. I have not experienced what you are seeing with the power steering. Make sure that Periphery FEA is all 0s. There is one periphery in there that calls for P/S but I am told that the version of rom we are using for v7 does not call any bits in FEA so they can all be 0.
Another little tidbit of info. The OBD Inspection section we need to make sure that we do not enable the Secondary Air System. USDM cars do not have this feature so make it unavailable and disabled. Not sure if this is a contributor to the OP, but it is worth a try.