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ISC replacement options. - GalantVR4. org So I sent my ECU to ECM Tuning to get some damage repaired and chipped last week and today I got a response about the damage repairs needed Seems the ISC driver kursploded from a short, which explains why it was unplugged The OEM replacement seems to be big money Has anyone had any luck with
ECU ISC Driver question - GalantVR4. org IC105 controls ECU pins 67 and 68, Idle Speed Control (ISC) Servo (coil pair B) IC106 controls ECU pin 57, Fuel Pressure Solenoid (FPS), and ECU pin 105, Boost Control Solenoid (BCS) IC107 controls ECU pins 58 and 59, ISC Servo (coil pair A) IC108 controls ECU pin 53, EGR Solenoid, and ECU pin 62, Evap Purge Solenoid
Troubleshooting ECU drivers and the ISC - GalantVR4. org The ISC has 2 coils They are referred to as coil pair A, and coil pair B Coil Pair A-When looking into the ISC, coil pair A is pins 1, 2 and 3 -ISC Pin 2 is ground for coil pair A-ISC Pin 1 is a coil and goes to ECU pin 58-ISC Pin 3 is a coil and goes to ECU pin 59-IC107 is the ECU driver that will blow if coil pair A is bad Coil Pair B
Lets talk FIAV and ISC block off plates! - GalantVR4. org The ISC did just fine, though as stated already - took a few more cranks and sometimes a second of throttle to get it idling normally Btw, 3 out of 4 adjusters were easy as pie to adjust down the runt of the litter was a B*tch!
ISC Failed - GalantVR4. org My idle started dropping under load and wouldn't maintain the 900rpm set in the eprom Logger shows 120 trying to bring it up I fiddled with the BISS to get the rpms up over 900 and the ISC counts went down to zero with no effect on the actual idle speed The ISC is about two years old
Setting BISS and ISC Range - GalantVR4. org I think it will lock itself at whatever Mitsu programmed it to when you ground those two (maybe its 30, I don't know) Once you ground them and set the idle to spec with the BISS your ISC reading after that will change with temperature, electrical load, AC load, PS load, and probably a bunch of other things John
Idle surge needs help - GalantVR4. org I have been replacing the ISC (used) and one of the IC that used to control the ISC motor couple years ago, the idle worked properly at that time,but for some reason,now it is idling around 1500~2000rpm, the idling gets lower when the temp is reaching to normal range around 1100~1400rpm but sometimes it would get higher when it stops at the
What throttle body for GVR4? - GalantVR4. org Yes newbie question here What other throttle body will mate to GVR4 I am looking to get one locally to remove the isc and plug the coolant line Would N T throttle work ok? or not because of the TB elbow? detail list would be greatly appreciated
ISC??? - GalantVR4. org The Top Mitsubishi Galant VR-4 Resource Join the best E39A 1991-1992 Mitsubishi Galant VR-4 community and document your GVR4 journey
1G DSM, get it up and running thread. - GalantVR4. org Whether or not the ECU is bad, also test the ISC with an ohm meter If the ISC is bad, replace it so it doesn't ruin your ECU or any new ECU you install With that much wiring and hoses chewed, and maybe even more you can't yet see, its going to be quite a chore to track down the problem, but I would start by making sure that the ECU is 100%