car stalls with a/c on - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

Notices
EcuFlash
Sponsored by:
Sponsored by:

car stalls with a/c on

Reply

 
 
 
Old Aug 7, 2008, 08:02 AM
  #1  
Evolved Member
Thread Starter
iTrader: (11)
 
FastAzzEvo's Avatar
 
Join Date: Jul 2006
Location: Augusta, GA
Posts: 755
Thanks: 0
Thanked 0 Times in 0 Posts
car stalls with a/c on

I know its a cam issue (cosworth) because it didn't do this until the cams were put in.

My tuner fixed it somewhat, but without it doing it all the time its hard to tune it out.

Here is what happens car runs fine with ac on and off,,,

however, with a/c on sometimes when I press clutch in and come to a stop the rpms drop to low and it stalls out... sometimes will making slow turns off roads which isn't good cuz the power steering.

If I ease at a light and stay in gear until I come to almost a complete stop its good, it seems it does it mostly when I see a red light push in clutch and quickly stop or when I do this and make a turn.

it never does it with a/c off..

if anyone can point me in the direction in ecu flash to correct this I'd really be appreciate it.
FastAzzEvo is offline  
Reply With Quote
Old Aug 7, 2008, 08:04 AM
  #2  
Evolved Member
iTrader: (30)
 
justboosted02's Avatar
 
Join Date: Jun 2006
Location: northeast
Posts: 1,821
Thanks: 0
Thanked 0 Times in 0 Posts
bump up your idle for when the AC is on. there is a table for it on your rom
justboosted02 is offline  
Reply With Quote
Old Aug 7, 2008, 08:15 AM
  #3  
Evolving Member
 
evo828's Avatar
 
Join Date: Apr 2007
Location: Slovakia
Posts: 195
Thanks: 0
Thanked 0 Times in 0 Posts
What are your logged values for the idle steps (ISC) when idling with ACC OFF and the ACC ON?
evo828 is offline  
Reply With Quote
Old Aug 7, 2008, 10:31 AM
  #4  
Evolved Member
iTrader: (30)
 
JohnBradley's Avatar
 
Join Date: Jan 2004
Location: Northwest
Posts: 11,366
Thanked 28 Times in 23 Posts
What I noticed was increase the ISCV table in the 77 and 82*c zones 10 points, and adjust the idle in the table. This works 90% of the time but you may find that some hardware adjustments are needed.
JohnBradley is offline  
Reply With Quote
Old Aug 7, 2008, 04:25 PM
  #5  
EvoM Guru
iTrader: (6)
 
Join Date: Feb 2007
Location: Melbourne, Australia
Posts: 9,482
Thanked 42 Times in 32 Posts
step 1 check your BISS screw.

- warm up your cra
- use evoscan 2.5 to "Activate the SAS MODE"
- check the IDLE, if its less than 800 use the BISS screw to raise it a bit...
tephra is offline  
Reply With Quote
Old Aug 7, 2008, 07:56 PM
  #6  
EvoM Moderator
iTrader: (27)
 
joedr's Avatar
 
Join Date: Feb 2006
Location: Puerto Rico
Posts: 792
Thanks: 0
Thanked 2 Times in 2 Posts
Question

Edit: Found the SAS mode!

Last edited by joedr; Aug 7, 2008 at 08:00 PM.
joedr is offline  
Reply With Quote
Old Aug 8, 2008, 02:48 PM
  #7  
EvoM Moderator
iTrader: (27)
 
joedr's Avatar
 
Join Date: Feb 2006
Location: Puerto Rico
Posts: 792
Thanks: 0
Thanked 2 Times in 2 Posts
Thumbs up

Originally Posted by tephra View Post
step 1 check your BISS screw.

- warm up your cra
- use evoscan 2.5 to "Activate the SAS MODE"
- check the IDLE, if its less than 800 use the BISS screw to raise it a bit...
tephra,

This actually solved my a/c stalling issue that was driving me crazy.

BTW, my car was automatically shut off everytime I was activating the SAS. I set mine to 900 +/- 50 RPMs with some S2s and a built head.
joedr is offline  
Reply With Quote
Old Sep 7, 2008, 11:57 AM
  #8  
Evolved Member
iTrader: (19)
 
gamebred26's Avatar
 
Join Date: Aug 2007
Location: NJ
Posts: 801
Thanks: 0
Thanked 0 Times in 0 Posts
what is the BISS screw the little screw in the throttle body?
gamebred26 is offline  
Reply With Quote
Old Mar 10, 2009, 04:29 PM
  #9  
Evolved Member
Thread Starter
iTrader: (11)
 
FastAzzEvo's Avatar
 
Join Date: Jul 2006
Location: Augusta, GA
Posts: 755
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by tephra View Post
step 1 check your BISS screw.

- warm up your cra
- use evoscan 2.5 to "Activate the SAS MODE"
- check the IDLE, if its less than 800 use the BISS screw to raise it a bit...
less than 800 with a/c on or off?



Got hot today a/c was running.. still noticing it drops... don't stall everytime, but when it does its kind of dangerous.
FastAzzEvo is offline  
Reply With Quote
Old Mar 10, 2009, 04:43 PM
  #10  
Evolved Member
iTrader: (10)
 
lan_evo_mr9's Avatar
 
Join Date: Feb 2006
Location: MD
Posts: 1,097
Thanks: 0
Thanked 1 Time in 1 Post
I had the same problem... Here's my idle stepper values that rectified it...
190
150
125
125
100
65
15
10
The above is for AC off... Here is AC on
180
164
153
147
133
103
40
32
Those are the "desired ISCV initial step" maps. Target idle with AC on is 852 and 844. I have no issues with stalling with the AC on anymore.

Last edited by lan_evo_mr9; Mar 10, 2009 at 04:46 PM.
lan_evo_mr9 is offline  
Reply With Quote
Old Mar 10, 2009, 06:52 PM
  #11  
Evolved Member
Thread Starter
iTrader: (11)
 
FastAzzEvo's Avatar
 
Join Date: Jul 2006
Location: Augusta, GA
Posts: 755
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by lan_evo_mr9 View Post
I had the same problem... Here's my idle stepper values that rectified it...
190
150
125
125
100
65
15
10
The above is for AC off... Here is AC on
180
164
153
147
133
103
40
32
Those are the "desired ISCV initial step" maps. Target idle with AC on is 852 and 844. I have no issues with stalling with the AC on anymore.

thanks man , i'll give this a try and report back.
FastAzzEvo is offline  
Reply With Quote
Old Mar 10, 2009, 07:11 PM
  #12  
Evolving Member
iTrader: (1)
 
mac214's Avatar
 
Join Date: Jul 2005
Location: All Over
Posts: 239
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by gamebred26 View Post
what is the BISS screw the little screw in the throttle body?
That would be the one.
mac214 is offline  
Reply With Quote
Old May 2, 2009, 04:36 PM
  #13  
Evolved Member
Thread Starter
iTrader: (11)
 
FastAzzEvo's Avatar
 
Join Date: Jul 2006
Location: Augusta, GA
Posts: 755
Thanks: 0
Thanked 0 Times in 0 Posts
well winter and fall have passed,, and turned the a/c on and still having problems with it stalling with a/c on and depressing clutch..

the rpms just fall way to low and it cuts off... never does this with a/c off.

I did the sas as stated above.. my idle is around 1000, it cut car off so i cranked it back up and its about 1000..

any other ideas...... before it gets really freakn hot...
FastAzzEvo is offline  
Reply With Quote
Old May 3, 2009, 01:53 AM
  #14  
Evolving Member
 
SkyNight's Avatar
 
Join Date: May 2008
Location: Rome
Posts: 141
Thanks: 0
Thanked 0 Times in 0 Posts
- Check idle with SAS screw (EVOScan 2.5 -> actuators -> SAS Mode or Speed Adj. Screw mode in EVOScan 2.6 Beta)
- Check in your map "Idle Stability Timing Control" (value: 128 - 8 - 8)
- Check the map of idle and if necessary set it to >=900 rpm

Good luck
SkyNight is offline  
Reply With Quote
Old May 8, 2009, 09:51 AM
  #15  
Evolved Member
Thread Starter
iTrader: (11)
 
FastAzzEvo's Avatar
 
Join Date: Jul 2006
Location: Augusta, GA
Posts: 755
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by SkyNight View Post
- Check idle with SAS screw (EVOScan 2.5 -> actuators -> SAS Mode or Speed Adj. Screw mode in EVOScan 2.6 Beta)
- Check in your map "Idle Stability Timing Control" (value: 128 - 8 - 8)
- Check the map of idle and if necessary set it to >=900 rpm

Good luck


check SAS...

when in evoscan.. it cause the car to cut off, once starting car. it idle around 1000rpms... so assume that the BISS screw is good

I have my ac 1 and ac 2 set to 1200 also.

Im still messing around with it, but i'm begining to think i'll have to take it somewhere to get this straight. I did last summer, but go figure I couldn't reproduce it cuz it doesn't do it all the time..

I'm trying to changin my driving habits, i basically have to stay in a gear until I'm almost stopped before pushing in the clutch..
FastAzzEvo is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: