Fuel Injector Wiring?? (for FIA2)
Jun 1, 2007, 09:33 AM
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Fuel Injector Wiring?? (for FIA2)
This question is directed to anyone who is using the FIA2 from aquamist. It requires you to tap the power and gnd(signal) from an injector, does anyone know which wire this is on the ecu (evo IX)
I have the pinout of the ECU and I can see the 4 wires for the injectors. I belive that I can tap any one of these wires to get the gnd (signal) used to trigger the FIA2.
However, I am not sure which power wire to use. Do I need to tap into the power to the injector or can I just tap into any power wire that turns on with the ignition?
Thanks
I have the pinout of the ECU and I can see the 4 wires for the injectors. I belive that I can tap any one of these wires to get the gnd (signal) used to trigger the FIA2.
However, I am not sure which power wire to use. Do I need to tap into the power to the injector or can I just tap into any power wire that turns on with the ignition?
Thanks
Jun 1, 2007, 09:43 AM
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I have the perrin injection kit and what I did was just tap into the switched 12v source going directly to the injector. there should be only 2 wires going to each injector and I just turned the key to the on position without starting the car and used a multimeter to find out which wire was 12v. and then the other wire is the negative of course. or if you have an aftermarket ECU the negative wire would be the one that you route to the ECU.
Jun 1, 2007, 09:50 AM
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The evo power wire to the injector can be quite confusing. I believe the evo have an inline resistor between the +ve 12V and injector +.
When you tap the red wire into the injector+, make sure you are tapping into the +12V side of the resistor rather than the injector side.
It might be easier to tap into the EMS pins rather the injector pins.
I see if I can get a drawing done for you.
Important: The DDS3's supply (pin24) can also be wired into the same red wire as the FIA2. The 3A fuse is adequate.
When you tap the red wire into the injector+, make sure you are tapping into the +12V side of the resistor rather than the injector side.
It might be easier to tap into the EMS pins rather the injector pins.
I see if I can get a drawing done for you.
Important: The DDS3's supply (pin24) can also be wired into the same red wire as the FIA2. The 3A fuse is adequate.
Jun 1, 2007, 09:53 AM
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To get this straight, you tapped the wires in the engine bay into the harness that plugs into the injector. Is this right?
I would prefer to not tap into wires under the hood like that.
I have stock ECU but I just have the wiring diagram, it shows the ground signal going to each injector, so for that part im good. But there is no dedicated power line that runs to each injector shown. I'm sure the injectors just use the same ign switch wire as all of the other components in the car.
This is shown as pin 68 on the ECU Diagram.
Attached is the wiring diagram for the Evo IX, the highlighted colors were not done by me.
Richard,
Please check the diagram I posted and verify my idea.
I am going to tap the FIA GND Signal wire to Pin 1 on the ECU
I am going to tap the FIA Power Wire to Pin 68 on the ECU (this is what I am not sure about)
I am also going to tap the main DDS3 power wire into pin 68 on the ECU
I am at work right now but I will check later, but I belive the wideband 02 sensor that I installed also is tapped into pin 68 for IGN switch.
I would prefer to not tap into wires under the hood like that.
I have stock ECU but I just have the wiring diagram, it shows the ground signal going to each injector, so for that part im good. But there is no dedicated power line that runs to each injector shown. I'm sure the injectors just use the same ign switch wire as all of the other components in the car.
This is shown as pin 68 on the ECU Diagram.
Attached is the wiring diagram for the Evo IX, the highlighted colors were not done by me.
Richard,
Please check the diagram I posted and verify my idea.
I am going to tap the FIA GND Signal wire to Pin 1 on the ECU
I am going to tap the FIA Power Wire to Pin 68 on the ECU (this is what I am not sure about)
I am also going to tap the main DDS3 power wire into pin 68 on the ECU
I am at work right now but I will check later, but I belive the wideband 02 sensor that I installed also is tapped into pin 68 for IGN switch.
Last edited by dudical26; Jun 1, 2007 at 09:59 AM.
Jun 1, 2007, 03:45 PM
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I have found a suitable EVO9 (JDM) diagram that may help. I added the HFS5-connections:
If you are wiring to the EMS, you can get the IDC signal from pin1, 2, 9 or 24.
For Switched 12V supply, any R-Y wire is OK (I think). I Believe ECU pin47 or 59 can be a +12V switched supply to FIA2 and DDS3. Pin46/58 is power ground.
I am suspecting pin68 will disconnect the +12V supply to the ECU during Cranking?
If you are wiring to the EMS, you can get the IDC signal from pin1, 2, 9 or 24.
For Switched 12V supply, any R-Y wire is OK (I think). I Believe ECU pin47 or 59 can be a +12V switched supply to FIA2 and DDS3. Pin46/58 is power ground.
I am suspecting pin68 will disconnect the +12V supply to the ECU during Cranking?
Last edited by Richard L; Jun 2, 2007 at 05:48 AM.
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Jun 1, 2007, 05:33 PM
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Richard,
Thanks a lot, I will run out to the car and test the voltage on those wires to see if it works as expected.
Where did you find that diagram?
Thanks a lot, I will run out to the car and test the voltage on those wires to see if it works as expected.
Where did you find that diagram?
Jun 1, 2007, 06:02 PM
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Richard,
I just tested and found the following.
With the key out, the Batt (backup) pin 60 has power
With the key out, the Ignition Switch pin 99 DOES NOT have power
With the key out, the Batt pin 47 and 59 DO NOT have power
With the key in the "ON" position, Ignition Switch Pin 99 has power
With the key in the "ON" position, Batt Pin 47 and 59 DO NOT have power
I have no way of turning my car on right now as there is no starter motor.
Is it possible that pin 47 and 59 will only have power when the car is running but not when the key is in the ON position?
Do these results help to verify or dicredit your findings?
Note: I currently have my transmission out of the car so several sensors in the engine bay are not plugged in, I dont know if this has any effect. Also I measured the voltage on the wires with the ECU unplugged, does that matter?
I just tested and found the following.
With the key out, the Batt (backup) pin 60 has power
With the key out, the Ignition Switch pin 99 DOES NOT have power
With the key out, the Batt pin 47 and 59 DO NOT have power
With the key in the "ON" position, Ignition Switch Pin 99 has power
With the key in the "ON" position, Batt Pin 47 and 59 DO NOT have power
I have no way of turning my car on right now as there is no starter motor.
Is it possible that pin 47 and 59 will only have power when the car is running but not when the key is in the ON position?
Do these results help to verify or dicredit your findings?
Note: I currently have my transmission out of the car so several sensors in the engine bay are not plugged in, I dont know if this has any effect. Also I measured the voltage on the wires with the ECU unplugged, does that matter?
Last edited by dudical26; Jun 1, 2007 at 06:06 PM.
Jun 2, 2007, 05:44 AM
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Thanks for the tests. It appeared the +12V feed to the ECU's pin47 and 59 only become active when the car is running. See the diagram below:
Green arrow activated by ECU and red arrow shows voltage flow:
It appear pin 46, 58 is a good ground for the DDS3 and FIA2. I am confident in recommending either pin47/59 be used for the FIA2 and DDS3.
Green arrow activated by ECU and red arrow shows voltage flow:
It appear pin 46, 58 is a good ground for the DDS3 and FIA2. I am confident in recommending either pin47/59 be used for the FIA2 and DDS3.
Last edited by Richard L; Jun 2, 2007 at 05:53 AM.
Jun 2, 2007, 02:23 PM
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Thanks for doing all this work. I will wire it up as you suggest and let you know how it goes. It may be a week or two until I get the car running.
I am extremely excited to get the HFS-5 up and running.
I have tried to take as many pictures as possible during the whole process. When its all done I am gonna do a big write up and post all the pictures. Should make installing aquamist kits on the EVO very straight forward for others.
I am extremely excited to get the HFS-5 up and running.
I have tried to take as many pictures as possible during the whole process. When its all done I am gonna do a big write up and post all the pictures. Should make installing aquamist kits on the EVO very straight forward for others.
Last edited by dudical26; Jun 2, 2007 at 02:26 PM.
Jun 2, 2007, 04:56 PM
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No hurry. I will await eagerly.
It will be great if you can spent the time doing a write up. So far I have not seen any post of this kind on this forum. Guess everyone is too busy tuning their car. There must be at least 20-30 EVO users on this system since the launch in March. Nevermind...
It will be great if you can spent the time doing a write up. So far I have not seen any post of this kind on this forum. Guess everyone is too busy tuning their car. There must be at least 20-30 EVO users on this system since the launch in March. Nevermind...
Jun 2, 2007, 08:00 PM
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I have already done the write up for assembling the system and the pump install. I have it saved on my computer and I just update it as I go along.
There is something similar that helped me on the SRT forums, it was pretty good having it so I figure it would be great to have one for the evo
There is something similar that helped me on the SRT forums, it was pretty good having it so I figure it would be great to have one for the evo
Jun 4, 2007, 01:27 PM
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https://www.evolutionm.net/forums/sh...d.php?t=251300
I had the same prob, Its now working great!!! I took the red wire and spliced it to the ecu wire direct, its the middle ecu plug, (looking at the plug how it plugs in) in the front of the wires all the way to the right you will see a all red wire with a small black line on the wire. That is the wire I used. Good luck!
I had the same prob, Its now working great!!! I took the red wire and spliced it to the ecu wire direct, its the middle ecu plug, (looking at the plug how it plugs in) in the front of the wires all the way to the right you will see a all red wire with a small black line on the wire. That is the wire I used. Good luck!