Wll put 60 miles on the car today with the A/C running, wife was with me, and it ran great except for one time it died. Was pulling into a parking space with the A/C running and made a hard turn and it died. Ran great the rest of the day though. I think I have a small vacuum leak somewhere.

 

This is great news. Takes one of the red marks off the pre-flight forms that's for sure.

 

I tried this last night and my idle became unstable. It would swing between 800 and 1500 RPM. Adjusting the BISS caused the swing range to shift up and down, but the idle would not stabilize. As soon as I cancelled the actuator the idle stabilized to ~900 RPM. Has anyone else had this issue?

-Paul

 

did u warm the car up first? like drive for 10mins then try?

 

In the DSM days there was an idle fuel cut limit.... IE some RPM where if the throttle was closed the ECU would cut fuel/spark to try to bring the idle back down. Your SAS/BISS may have been so far out of adjustment that it was raising the idle beyond this point (if the same is true for Evos). With the ISCV activated it may have been able to keep it just low enough

Awesome work on the SAS setting though. I was wondering how to do this on an Evo.

 

When i actuate dthe SAS the idle was swinging very badly then it stabilized somewhat. I adjusted the BISS and the idle got smoother. I canceled the SAS actuator and the idle was smooth. The idle still fluctuates a little but near as bad as before.

 

Very nice finding!

I am running hell with my S2s and built head. Mine idles fine but when going from cruise to stop (with A/C on)... the car idle goes to low and the engine shuts off.

I will test today and post results. That is the only thing that I am not liking on my setup right now.

 

what is the trick to setting the BISS using SAS mode when you have cams? as soon as i press the actuator button the rpm drop and the car dies

 

you need to open the screw more then.

just open it a couple of turns and then try the SAS mode again.

 

oh ok i thought turning on SAS mode always brought the car back to 800, thanks Tephra i'll try it again tomorrow

 

sas will hold the isc at 7 steps and then you need to wind the air bypass screw to obtain the correct idle for most mitsi's its 750+/-50rpm and gdi 950+/- 50 rpm the reason it sets it to 7 steps is to prevent the plunger resting on the seat of the housing and possibly freezing in position overnight. usually if you clean the carbon around the throttle butterfly then execute the sas actuator your idle will reset to 750 rpm at 7 steps and wont need adjusting via the bypass screw.

 

Anyway to set BISS w/o evoscan or the Mitsu MUT tool?

 

not that I know of, EvoScan is the only way I know of to set the actuators easily.

 

I've got serious idling problems and throttle hang but it seems something is very wrong with my car....

the weird thing is...when I unscrew the BISS (free the hole) in sas mode the rpms drops and when I screw it (block the hole) the rpms rise
that's not the way it's supposed to work, is it ?

my car must be from a parallel universe or something :/
anyone has an idea why it doesn't work as it should ?

 

trying to get my IDLE set properly with my HKS cams, and I cannot get the actuator to work in evo scan.

Info: OpenPort 2.0 Found.
Info: OpenPort Firmware v1.07.259
Info: Battery 14.203V
Info: Initialize Vehicle ECU...
Info: Initializing At 5 baud...
Info: Timer: 2122.407ms
Info: Initialization Complete...
Info: Waiting for INIT Response...
Info: ECU ID: E0FA
Info: Connection successful...
Error: No Response from Vehicle ECU
Info: Actuator Complete.