car stalls with a/c on - Page 2 - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community



car stalls with a/c on

Reply
 
 
 
Thread Tools Search this Thread
Old May 10, 2009, 03:59 PM   #16
Evolving Member
 
silver_evo's Avatar
 
Join Date: Dec 2005
Location: Silverdale,WA
Posts: 258
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 03 Evo VIII

ALso going open loop from 0-1500 and <30 load can help.
Offline
 
Reply With Quote
Old May 10, 2009, 04:11 PM   #17
Evolving Member
iTrader: (2)
 
kkarim's Avatar
 
Join Date: Sep 2007
Location: Florida / Lebanon
Posts: 214
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2006 RR Evolution IX

Quote:
Originally Posted by FastAzzEvo View Post
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..
if your car is turning off when you engage the sas mode, you definitely have to open up your idle screw. try to open it a few turns, and try the sas mode again with the car on. the car should be able to keep your target idle speed WHILE in SAS mode.
Offline
 
Reply With Quote
Old Jun 1, 2009, 07:40 PM   #18
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

Drives: 2006 Evo IX GSR/SSL

Quote:
Originally Posted by kkarim View Post
if your car is turning off when you engage the sas mode, you definitely have to open up your idle screw. try to open it a few turns, and try the sas mode again with the car on. the car should be able to keep your target idle speed WHILE in SAS mode.
really? I'll have to try it again tomorrow.. I have made changes and have since adjusted screw, but haven't activated the SAS mode yet.

it is still turning off at random when coming up to a light or when engaging the clutch at a high rpm.

if i roll to the light in gear and when the rpms are real low and then engage the clutch it won't shut off.. but it is crazy when coming up to a turn and downshifting into 2nd and the car cuts off. scares the **** out of me every time lol

I am starting to think its more of my ams intake/maf issue.... guess it might be time for a ems/map setup
Offline
 
Reply With Quote
Old Jun 2, 2009, 08:26 AM   #19
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

Drives: 2006 Evo IX GSR/SSL

check the SAS again after makind adjustments..

activating SAS with A/C off the idle drops from 900-1000 to about 700-800

when activating SAS with a/c on the idle drops to about 500-700.
Offline
 
Reply With Quote
Old Jun 25, 2009, 08:16 AM   #20
Evolved Member
iTrader: (11)
 
Smoothgangsta's Avatar
 
Join Date: Jan 2005
Location: United States
Posts: 584
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: 2013 Wicked White Evo X w/SSS package

You should be able to log with Mitsulogger without any accessories, lights, radio, etc. on and see where your ISCV steps are at. From what I have been told the ideal range is 20-30 steps at IDLE when the fan is not on. They can be adjusted down to the 10-15 range by turning the BISS counter clockwise to allow more air to bypass the throttle body.

Just make sure that you don't turn the BISS out counter clockwise too far as you will see the ISCV steps get down to 0 and then the ECU will not have any way to adjust steps accordingly based on the stepping tables. There is a middle ground...

Also I believe when the fan kicks on as you idle that the RPMs should dip briefly but then rise...if they immediately rise and don't dip when the fan kicks on I believe that means you have turned the BISS counter clockwise too far. That's what I have noticed.

By letting a bit more air bypass the throttle body it should keep the car from stalling out with the AC on.

Also, I think adjusting the BISS is the "last" resort in trying to fix an IDLE/stalling issue.
Offline
 
Reply With Quote
Old Jun 25, 2009, 12:31 PM   #21
Evolved Member
iTrader: (22)
 
Appauldd's Avatar
 
Join Date: Nov 2003
Location: Northern KY near Cincy
Posts: 2,408
Thanks: 0
Thanked 2 Times in 2 Posts

Drives: 2003 Mitsu EVO (white)

I am fighting the same monster. SAS is great with AC off. Holds idle well at about 950 compared to my setting of 1070. I guess I could tweek it a bit more.

I raised the ISCV steps by 10 in the last 2 points. I didn't notice this helping at all.

Big cams, Green, port work, and hard pipes = PITA to get to idle. GRRRR
Offline
 
Reply With Quote
Old Jun 25, 2009, 01:00 PM   #22
Evolving Member
iTrader: (16)
 
Kilratio's Avatar
 
Join Date: Jun 2006
Location: Atlanta
Posts: 205
Thanks: 0
Thanked 0 Times in 0 Posts

Drives: Evolution 8, MK4 GTI VR6

Stock ecu? Call Mellon Tuning and be done with it....
Offline
 
Reply With Quote
Old Jun 26, 2009, 04:23 AM   #23
Evolved Member
iTrader: (22)
 
Appauldd's Avatar
 
Join Date: Nov 2003
Location: Northern KY near Cincy
Posts: 2,408
Thanks: 0
Thanked 2 Times in 2 Posts

Drives: 2003 Mitsu EVO (white)

Has anyone logged load with the A/C on?

I ask because I believe that A/C increases the load on the engine a bit. Therefore, we would need to adjust the timing in the idle area with A/C on to get desired results.

On a stock ROM you can see that in the 60 load range the timing inceases greatly in the idle range. I believe this, very well, could be because of the increased load the engine sees with the A/C on.

SO......Those of us with big cams, turbos, and hard pipes only need to log the load at idle with the A/C on and adjust timing accordingly. Hopefully.
Offline
 
Reply With Quote
Old Jul 14, 2009, 11:23 AM   #24
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

Drives: 2006 Evo IX GSR/SSL

I'm going to work on it more this week. I wanna get this taken care before its gets cooler or car sells.
Offline
 
Reply With Quote
Old Jul 14, 2009, 11:51 AM   #25
Evolved Member
iTrader: (22)
 
Appauldd's Avatar
 
Join Date: Nov 2003
Location: Northern KY near Cincy
Posts: 2,408
Thanks: 0
Thanked 2 Times in 2 Posts

Drives: 2003 Mitsu EVO (white)

I forgot all about this thread.

I have my AC issue completly resolved. Below is the things I did to cure it. Yes it is a lot.

Raised Idle zone timing (below 1250 rpm and below 50 laod) to 11
Opened up the BISS quite a bit (opened until I heard it hiss, then back in 1 full turn)
Raised the ISCV for AC on lower two block to 60 and 70
Increased other ISCV tables lower two blocks by about 10 each
Increased AFR in the 500 rpm and 80 load in below to 14.4
Raised the Idle RPM with AC on to 1234
Adjusted idle error tables to start with 0 and go up to 8
Raised idle stability timing control sensitivity to 150
Offline
 
Reply With Quote
Old Jul 14, 2009, 12:07 PM   #26
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

Drives: 2006 Evo IX GSR/SSL

Quote:
Originally Posted by Appauldd View Post
I forgot all about this thread.

I have my AC issue completly resolved. Below is the things I did to cure it. Yes it is a lot.

Raised Idle zone timing (below 1250 rpm and below 50 laod) to 11
Opened up the BISS quite a bit (opened until I heard it hiss, then back in 1 full turn)
Raised the ISCV for AC on lower two block to 60 and 70
Increased other ISCV tables lower two blocks by about 10 each
Increased AFR in the 500 rpm and 80 load in below to 14.4
Raised the Idle RPM with AC on to 1234
Adjusted idle error tables to start with 0 and go up to 8
Raised idle stability timing control sensitivity to 150
on this right here
Increased other ISCV tables lower two blocks by about 10 each

what is it currently after the change?
Offline
 
Reply With Quote
Old Jul 14, 2009, 03:20 PM   #27
Evolved Member
iTrader: (22)
 
Appauldd's Avatar
 
Join Date: Nov 2003
Location: Northern KY near Cincy
Posts: 2,408
Thanks: 0
Thanked 2 Times in 2 Posts

Drives: 2003 Mitsu EVO (white)

ISCV AC off Neutral 77* = 20 and 82* = 17
ISCV AC off Drive 77* = 29 and 82* = 16
ISCV AC ON Nuetral 77* = 70 and 82* = 60
Offline
 
Reply With Quote
Old Jul 14, 2009, 05:15 PM   #28
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

Drives: 2006 Evo IX GSR/SSL

Quote:
Originally Posted by Appauldd View Post
I forgot all about this thread.

I have my AC issue completly resolved. Below is the things I did to cure it. Yes it is a lot.

Raised Idle zone timing (below 1250 rpm and below 50 laod) to 11
Opened up the BISS quite a bit (opened until I heard it hiss, then back in 1 full turn)
Raised the ISCV for AC on lower two block to 60 and 70
Increased other ISCV tables lower two blocks by about 10 each
Increased AFR in the 500 rpm and 80 load in below to 14.4
Raised the Idle RPM with AC on to 1234
Adjusted idle error tables to start with 0 and go up to 8
Raised idle stability timing control sensitivity to 150


Thanks MAN!!!!!!!!!!!!!!!!!!!!!

so far I did 90% of the things on there and so far after a 20min traffic drive it didn't cut off on me not once.. with AC on full powa!!!
Offline
 
Reply With Quote
Old Jul 14, 2009, 05:42 PM   #29
Evolved Member
iTrader: (22)
 
Appauldd's Avatar
 
Join Date: Nov 2003
Location: Northern KY near Cincy
Posts: 2,408
Thanks: 0
Thanked 2 Times in 2 Posts

Drives: 2003 Mitsu EVO (white)

AHH Another happy customer.

Guess you need to change that signature of yours.....lol
Offline
 
Reply With Quote
Old Jul 14, 2009, 05:49 PM   #30
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

Drives: 2006 Evo IX GSR/SSL

Quote:
Originally Posted by Appauldd View Post
AHH Another happy customer.

Guess you need to change that signature of yours.....lol
hahah, yea,,,

he tuned it before it go hot and i was using a/c... Sure he could of fixed that though I'm sure...

nonetheless ,,, I'm glad this thread is helping people out.. cuz it was very annoying and dangerous IMO..

I'm still in my testing phase though. Tomorrow I'll know for sure.
Offline
 
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
RPM fluctuation with A/C on!!! Jbone Lancer Troubleshooting 4 Sep 11, 2015 09:20 PM
Evo stalls when heat is turn on rob328 Evo General 16 Dec 2, 2010 04:10 PM
Evo 9 stalls out problem 240sxzenki Evo General 30 Nov 4, 2010 02:51 PM
car stalling in neutral/clutch down alpix715 Evo Engine / Turbo / Drivetrain 6 Aug 30, 2010 03:13 AM
ECUFlash idle tables with A/C on Kracka EcuFlash 8 Oct 3, 2009 04:13 PM


Tags
2003, ac, biss, car, control, idle, lancer, mitsubishi, ralliart, running, screw, stability, stall, stalls, timing

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 02:05 AM.


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