ej22t ECU with USDM coils?

[legacymax]

So my car is still not running, going on 5 months now. I have swapped a ej22t/20H engine into it. I tried ej20g ECU with coil on plug swap. No go except on #1 and #4 cylinder. I then swapped to USDM coils with the built-in ignitors, still only firing on #1 and #4. After trying many things, I decided to switch back to a ej22t ECU but still use the USDM coils. Since they already have the ignitors built-in to them, I should be able to get rid of the standard ignitor, the two coils on the top of the engine, and the plug wires right? So I wired the signal wire from pin #10 and split it to signal to both #1 and #2. Signal wire from pin #9 split and went to #3 and #4. Now I am only getting spark to #1 cylinder. I swapped the MAF, added the purge canister sensor. The IAC has not thrown a code at me so I am not too worried about that, should I be? I will also post this on NASIOC.
Thanks
-Max

[PhyrraM]

I think for that setup, I would let the EJ22t ECU fire the stock EJ22 ignitor. I would then let each channel of the ignitor fire 2 WRX coils. The only problem I can see is that you might need a diode between the ignitor and each coil to keep them from backfeeding each other.

As far as missing spark, I assume you have checked continuity from the ECU to the coilpack connector for each wire with everything plugged in?

[SemperGuard]

I just got done doing something similar. I'm running an EJ22T engine with an EJ20G ECU. The only way to get it to start and run properly is to match the ignitor to the ECU, I found. I tried doing what you did, splicing and changing for a while, then broke down and put in an EJ20G ignitor, and spliced the coils from the ignitor. It started right up and ran just fine. So you have to use an ignitor that has at least four seperate channels. If you're using an EJ20G ECU and Ignitor run each wire from the ECU to the appropriate input on the ignitor and then splice the outputs from the ignitor to the coils. If you're using an EJ22T ECU, leave everything stock and just adapt the spark plug wires. I haven't tried with coil on plug and EJ22T ECU/Ignitor.

[legacymax]

Well, It was ej20g ECU with USDM coils (they have the ignitor built in to them) , and I haven't been able to get the car running(runs on #1 and #4). So I was going to try to swap the 22t ECU in but still run the USDM coils and just split the wiring to the 2 coils for each batch. It looks like I am going to go back to ej20g ECU and maybe swap the whole EJ20G harness into the car.
-Max

[SemperGuard]

What USDM coils? Do you mean the single coilpack on top of the manifold? Or do you mean individual coils? Like what came on the SVX? Either way they don't have ignitors built into them. The ignitor is separate. The individual coilpacks have a coil built into each of them, but no ignitor.

Or are you using (and I'm pretty sure you are after thinking about it) new age coils? Like the ones on our WRX/STi? If so I don't think that is going to work. The old ECUs with seperate ignitors grounded the ignition through the ECU to complete the circuit. The newer ECUs with coil/ignitor integrated supply B+ to complete the circuit. I think you could wire it up such that pin 3 at the ignitor/coil receives B+ from the ignition switch, and pin 1 at the ignitor/coil recieves B+ from the ECU (these two pins would be just like the stock WRX/STi setup), then have pin 2 at the ignitor/coil ground through the ecu like the stock setup. You might be able to just run pins 3 and 1 to the same B+, but you also might not.

[SemperGuard]

I just reread. So it would fire #1 and #4? That is odd. Are the coil/ignitors good? If so, it sounds like there's a wiring problem. The fact that you're getting spark on #1 and on #4 is wierd. When you plug an EJ20G into a stock EJ22T wiring setup you should have spark on #1 and #3. As was said before, I'd check for continuity at all wiring first.

Also, about the IAC, I see that you reversed the wiring for this, why did you do this? What intake manifold/IAC valve are you using?