Stop your Car Stalling from Clutch in! - evolutionm.net



Stop your Car Stalling from Clutch in!

Reply
 
 
 
Thread Tools Search this Thread
Old Nov 29, 2010, 06:04 AM   #1
Newbie
Thread Starter
iTrader: (1)
 
Join Date: Apr 2008
Location: Sydney, Australia
Posts: 32
Thanks: 0
Thanked 0 Times in 0 Posts
Stop your Car Stalling from Clutch in!

Been experimenting with the ISCV Tables that MrFred kindly found.
I was having stalling issues after putting FIC 1050s in.
The car would want to stall on clutch in, or after lifting the throttle after applying light-medium throttle on high load (like going up a hill slowly).

I have fixed 90% of the stall issue by increasing the values of the 'ISCV Demand RPM Adder*' table!

500 11.8
1000 11.8
1500 11.8
2000 11.8
2500 12.2
3000 13.3
3500 14.5
4000 16.1
4500 17.6
5000 20.0

I made the first 4 values the same, so that the ECU doesn't try and interpolate between two rows and cause your idle to fluctuate.

Also, I've determined the function of some of the ISCV tables so that they have more meaningful names. This is for 96530706 by the way.

The drive tables don't seem to do anything on manual transmission EVOs; they look like orphaned tables from the Jap Spec EVO 7 GTA which is an Auto.
You need to make changes to the tables marked neutral.
The old 'Decel Fuel Cut Delay' tables are actually TPS based ISCV adder tables!

'ISCV Demand CTS Adder #1**' -> 'ISCV Demand CTS Adder AC Off - Neutral'
'ISCV Demand CTS Adder #1b***' -> 'ISCV Demand CTS Adder AC On - Neutral'
'ISCV Demand CTS Adder #1a***' -> 'ISCV Demand CTS Adder AC On - Drive'

One table missing is:

<table name="ISCV Demand CTS Adder AC Off - Drive" category="ISCV Control" address="4296" type="2D" scaling="ISCV_AX2_8">
<table name="Engine Temp" address="6a86" type="Y Axis" elements="8" scaling="Temp"/>
</table>

This table is called 'Desired ISCV intial step position with AC off-Drive' in the original ecuflash xml.
It should be relabelled 'ISCV Demand CTS Adder AC Off - Drive'.

'Decel Fuel Cut Delay #1' -> 'ISCV Demand TPS Adder AC Off - Neutral'
'Decel Fuel Cut Delay #2' -> 'ISCV Demand TPS Adder AC Off - Drive'
'Decel Fuel Cut Delay #3' -> 'ISCV Demand TPS Adder AC On - Neutral'
'Decel Fuel Cut Delay #4' -> 'ISCV Demand TPS Adder AC On - Drive'

Scaling of these tables should be changed to 'ISCV_AX2_8'.

Last edited by simple_lancer; Nov 29, 2010 at 02:20 PM.
Offline
 
Reply With Quote
Old Nov 29, 2010, 08:01 AM   #2
Evolved Member
iTrader: (10)
 
Raptord's Avatar
 
Join Date: Mar 2009
Location: Gatineau, Quebec, Canada
Posts: 3,461
Thanks: 0
Thanked 7 Times in 7 Posts

Drives: AS Evo IX SE

Interesting, I'm having similar problems with my car, so I'll give that a shot when I get home and report back.
Offline
 
Reply With Quote
Old Nov 29, 2010, 09:07 AM   #4
Evolved Member
iTrader: (6)
 
Drifting Away's Avatar
 
Join Date: Jun 2004
Location: Houston
Posts: 684
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2006 Evolution MR

good info.
Offline
 
Reply With Quote
Old Nov 29, 2010, 01:51 PM   #5
Evolved Member
iTrader: (9)
 
Join Date: Jan 2005
Location: Space time
Posts: 1,257
Thanked 12 Times in 11 Posts

Drives: 05 RR RS

I will also be testing this on my way home from work. Good Stuff.
Offline
 
Reply With Quote
Old Nov 29, 2010, 02:34 PM   #6
Evolved Member
iTrader: (2)
 
Join Date: Mar 2004
Location: CA
Posts: 3,499
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2005 EVO VIII

Nice work.

Mrfred already mentioned that the decel fuel cut tables were TPS demand tables. The defintions were adjusted in the main thread.
Offline
 
Reply With Quote
Old Nov 29, 2010, 03:14 PM   #7
Evolved Member
iTrader: (6)
 
dxbevo9's Avatar
 
Join Date: Jan 2005
Location: Dubai, U.A.E.
Posts: 2,719
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 3 different Evo's :)

Nice work..will give it a try on one of our cars and give feedback soon

Thanks for sharing
Offline
 
Reply With Quote
Old Nov 29, 2010, 04:07 PM   #8
Evolved Member
iTrader: (9)
 
Join Date: Jan 2005
Location: Space time
Posts: 1,257
Thanked 12 Times in 11 Posts

Drives: 05 RR RS

Ok ran this on my way home from work today. It worked very well in traffic. Before it was very common for my car to dip below 500rpm and stumble around a little and then idle backup.

Now with the changes, the car will drop to the 800rpm range and idle up nicely. Sometime at 3000rpm, and a clutch press in it would drop to about 1100rpm and then finally settle at about 850rpm.

I did have the car stumble on me one time out of 50mile drive in traffic and lights. However it normally takes my car a while to recover from the stumble, but now it took care of it really well.

2150cc Injectors
Evo9 Turbo
VTA BOV
Stock pretty much everything else.


A little more info.

I just tested the other part of this tonight, as the weather has diped into the low 50's in CA. This update has really helped my car idle 1000000% better in the cold weather. This is just fantistic. Tomorrow I will test this out with the AC on and see how that works.

THanks

Last edited by TheBoz; Nov 29, 2010 at 10:04 PM.
Offline
 
Reply With Quote
Old Nov 29, 2010, 05:29 PM   #9
Newbie
Thread Starter
iTrader: (1)
 
Join Date: Apr 2008
Location: Sydney, Australia
Posts: 32
Thanks: 0
Thanked 0 Times in 0 Posts
If it's dropping to 800, then you might need to increase the values between 500-2000rpm to maybe around 12.8 or so.

Also, check you Base Idle screw is set properly!

Glad it helped out, keep playing with it and it should improve further.
Offline
 
Reply With Quote
Old Nov 29, 2010, 06:34 PM   #10
Evolved Member
iTrader: (1)
 
Join Date: Apr 2007
Location: Melbourne
Posts: 529
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evolution 8 MR (JDM)

Awesome Work mate. I will try it later.... Missing v7 on 9653... My problems were related to cams.
Offline
 
Reply With Quote
Old Nov 29, 2010, 09:34 PM   #11
Evolved Member
iTrader: (16)
 
bboypuertoroc's Avatar
 
Join Date: May 2005
Location: Lacey/JBLM, WA
Posts: 1,712
Thanked 3 Times in 3 Posts

Drives: 2006 Evo IX

I'll need to try this out. I'm having the same issue.
Offline
 
Reply With Quote
Old Nov 30, 2010, 04:59 AM   #12
Evolved Member
iTrader: (10)
 
Raptord's Avatar
 
Join Date: Mar 2009
Location: Gatineau, Quebec, Canada
Posts: 3,461
Thanks: 0
Thanked 7 Times in 7 Posts

Drives: AS Evo IX SE

Tried it out this morning; Didn't do anything to help me, unfortunately. I still had to feather the throttle to keep it from stumbling to 500rpm while I was parking.
Offline
 
Reply With Quote
Old Nov 30, 2010, 05:09 AM   #13
Evolving Member
 
RJSP's Avatar
 
Join Date: Aug 2009
Location: Lima, Peru
Posts: 229
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evolution V RS

I´ve been running without a ISCV for the past year (too expensive and weather here is stable) and my car stalled a lot if you gave it medium throttle or more and then pressed the clutch, as in traffic driving. My idle is set at around 900 rpm and that helps, but what totaly solved my problem was a properly working BOV.

My beatup Greedy Type RS had a leaky diaphragm, so I switched to a GFB Respons BOV set the spring tension properly and now the car doesn´t stall at all. Both BOV are set to 100% recirculating, but with the GFB even at 50/50 it doesn´t stall the car.

Cheers,

Ricardo
Offline
 
Reply With Quote
Old Nov 30, 2010, 06:41 AM   #14
Evolved Member
 
hediki12's Avatar
 
Join Date: May 2009
Location: mnt vernon ny
Posts: 522
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 95 taln tsi

very intresting. ill give this a shot. these injectors (fic 1050s) have been a real pain to me. this close to selling them.
Offline
 
Reply With Quote
Old Nov 30, 2010, 12:17 PM   #15
Evolving Member
iTrader: (1)
 
Join Date: Aug 2008
Location: Lincoln, Ne
Posts: 320
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2005 evolution 8 gsr

I am having the same issue from time to time, yet this is the only issue I have really had with the 1050's. Other than that, I love them Im running e85 on stock 8 turbo at around 400/400 btw. I will have to try this in the spring when my car comes back out to play...
Offline
 
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Tuning for Colder Thermostat... Raceghost EcuFlash 23 Dec 11, 2016 12:35 AM
Start-up Fuel and ISCV Tables Dynotech Tuning EcuFlash 80 Sep 20, 2016 01:30 PM
ISCV control system disassembly mrfred EcuFlash 399 Jul 29, 2016 07:02 PM
How to Eliminate "Rev-Hang" on the 05+ EVO 8/9s Boosted Tuning EcuFlash 41 Oct 31, 2015 06:06 AM
94170015 vs. 95070008 I Found an issue Appauldd EcuFlash 5 Feb 23, 2009 08:05 PM


Tags
avoid, car, clutch, disengage, evo, evolutionm, evoscan, hill, iac, iscv, set, stall, stalling, stop, tables, tuned

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -7. The time now is 09:04 PM.


 
  • Ask a Question
    Get answers from community experts
What's your question?
Send