Panos MZR Posted October 1, 2021 Report Share Posted October 1, 2021 Hello. I have an s13 sr20de converted to turbo. everything works fine except the idle valve. Valve is connected on injector 7 as per the wiring diagrams. with stock ecu idle valve works fine. Also i tested the idle valve with external source and solenoid works. I attached the tune for anyone if you can help. Thanks, s13.pclx Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 1, 2021 Report Share Posted October 1, 2021 Your idle speed control is not tuned at all. Follow the Open Loop ISC tuning procedure, then Closed Loop ISC procedure on the help file under G4X ECU Tuning Functions > Idle Speed Control. Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 1, 2021 Author Report Share Posted October 1, 2021 6 minutes ago, essb00 said: Your idle speed control is not tuned at all. Follow the Open Loop ISC tuning procedure, then Closed Loop ISC procedure on the help file under G4X ECU Tuning Functions > Idle Speed Control. it shouldn't operate on test mode no mateer what? Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 1, 2021 Report Share Posted October 1, 2021 12 minutes ago, Panos MZR said: it shouldn't operate on test mode no mateer what? Change Aux Fuel # 7 Active State to 'Low', then try test again. Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 1, 2021 Author Report Share Posted October 1, 2021 Just now, essb00 said: Change Aux Fuel # 7 Active State to 'Low', then try test again. I did. Tried several frequencies too. Still nothing Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 1, 2021 Report Share Posted October 1, 2021 4 minutes ago, Panos MZR said: I did. Tried several frequencies too. Still nothing Are you sure your ISC is connected to Inj 7, not Inj 5? Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 1, 2021 Author Report Share Posted October 1, 2021 12 minutes ago, essb00 said: Are you sure your ISC is connected to Inj 7, not Inj 5? Yes. Tried inj5 too. Still nothing Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 1, 2021 Report Share Posted October 1, 2021 What ecu do you have? S13 plug-in doesnt even have a Inj7 pin. Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 1, 2021 Author Report Share Posted October 1, 2021 21 minutes ago, Adamw said: What ecu do you have? S13 plug-in doesnt even have a Inj7 pin. S15link Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 1, 2021 Report Share Posted October 1, 2021 Ok that should work. Confirm you have constant 12V on pin 109 which is the flywheeling diode for the idle valve. Put it in test PWM mode with frequency at 10Hz to see if it clicks. Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 1, 2021 Author Report Share Posted October 1, 2021 1 hour ago, Adamw said: Ok that should work. Confirm you have constant 12V on pin 109 which is the flywheeling diode for the idle valve. Put it in test PWM mode with frequency at 10Hz to see if it clicks. Will do and reply soon. Thanks Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 3, 2021 Author Report Share Posted October 3, 2021 On 10/1/2021 at 11:57 PM, Adamw said: Ok that should work. Confirm you have constant 12V on pin 109 which is the flywheeling diode for the idle valve. Put it in test PWM mode with frequency at 10Hz to see if it clicks. Confirmed 12v on pin 109. Tested as above still doesn't work Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 3, 2021 Report Share Posted October 3, 2021 If you set Inj 7 to "Test (On)" (not PWM), what voltage do you have on pin 113? And then with the test off what voltage on pin 113? Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 4, 2021 Author Report Share Posted October 4, 2021 10 hours ago, Adamw said: If you set Inj 7 to "Test (On)" (not PWM), what voltage do you have on pin 113? And then with the test off what voltage on pin 113? 0V on both conditions. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 4, 2021 Report Share Posted October 4, 2021 10 minutes ago, Panos MZR said: 0V on both conditions. That would suggest there is no 12V supply to the idle valve - or the idle valve is not actually connected to pin 113. Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 4, 2021 Author Report Share Posted October 4, 2021 32 minutes ago, Adamw said: That would suggest there is no 12V supply to the idle valve - or the idle valve is not actually connected to pin 113. I checked from the ecu side and there is no voltage after ecu. So issue probably is the ecu Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 4, 2021 Report Share Posted October 4, 2021 You need to do it with the idle valve connected. the 12V comes from the other side of the idle valve. Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 4, 2021 Author Report Share Posted October 4, 2021 12 minutes ago, Adamw said: You need to do it with the idle valve connected. the 12V comes from the other side of the idle valve. Idle valve is connected Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 4, 2021 Report Share Posted October 4, 2021 Then my comment stands. When the aux is off, there should be 12V flowing through the idle valve up to the ecu pin. If you measure voltage anywhere in that circuit it should be 12V - even with the ECU unplugged. Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 4, 2021 Author Report Share Posted October 4, 2021 12 minutes ago, Adamw said: Then my comment stands. When the aux is off, there should be 12V flowing through the idle valve up to the ecu pin. If you measure voltage anywhere in that circuit it should be 12V - even with the ECU unplugged. Pin 109 or 113? Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 4, 2021 Report Share Posted October 4, 2021 113. The wire that comes from the idle valve Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 4, 2021 Author Report Share Posted October 4, 2021 2 hours ago, Adamw said: 113. The wire that comes from the idle valve No voltage Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 5, 2021 Author Report Share Posted October 5, 2021 Any other suggestions? Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 5, 2021 Report Share Posted October 5, 2021 So if you unplug the idle valve, do you have 12V on either of the pins in the plug? Quote Link to comment Share on other sites More sharing options...
Panos MZR Posted October 5, 2021 Author Report Share Posted October 5, 2021 1 hour ago, Adamw said: So if you unplug the idle valve, do you have 12V on either of the pins in the plug? No Quote Link to comment Share on other sites More sharing options...
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