DaveyWoif

So I am in the process of upgrading and making sure I a ready for a turbo and decided to do the Toyota COPS setup exactly like the popular write up on here. I bought the coils on eBay 3 of which were Toyota OE and one newer looking one was not. All of them were one of the part numbers referenced in the write up. Made my harness and soldered every connection, made it look nice then took the igniter from the car and gutted it for the plug and play option. I switched the tach and signal wires on the coils the first time on accident so I am wondering if I might have messed up something with that. Once I triple checked the wiring was right with a multimeter I put everything back in the car and it will only fire on cylinder 2 and 3. Switched the coils out between 2 and 3 then 1 and 4 and there was no change. Also tried with only 1 and 4 plugged in and it wouldn't even fire. I am pretty sure the coils are good due to that test. I read some people had issues with two cylinders firing because of the CAS so I just replaced that and still the same exact issue. I now have another igniter on the way to put back in place and see if it will still run with stock coils and wires. I am afraid it is in my ECU now and I will have to do that next. I am planning on building a megasquirt relatively soon but don't have time to start on that yet. So basically I am trying to figure out if there are any other known factors to cause this.

TL;DR
Fires on Cyl 2&3 after Toyota COPS install
Toyota COPS good
New (used) CAS=same issue
Used igniter in harness build so I can't check if OEM ignition works now
So ECU? or some other issue.

Barton

Remove them and put the stock coils back in until you're running a megasquirt. You don't need them and you will be over dwelling them. I'd guess you don't have continuity between the ecu output for coil 1 & 4 and the coils.

pdexta

iTrader: (17)

Go over that wiring real well. If you wired them you know 1 & 4 are paired together so something (power, ground, trigger) isn't getting there.

Also, what Barton said, you really need a megasquirt to control dwell settings. You're better off swapping back to stock now and add the COPS once you get the MS.

DaveyWoif

Yeah I am going to be switching back as soon as I get an igniter this week in the mail, but was hoping I could figure it out before then. I did read about the coils burning themselves up due to the dwell settings. Still not sure why they wouldn't work though. I have gone over continuity about 5 or 6 times now, but I will check again who knows. Am I correct in assuming that the ECU would be the next link in the chain or how would I test that?

Bronson M

iTrader: (1)

If you have power to the coil then yes the ECU would be the next stop as that's where you get the ground.

DaveyWoif

Well got it put back to stock and I must have fried something. Replaced the CAS with a "known good" CAS and a "known good" igniter and it will still only fire on two cylinders. Guess the ECU will be next to try. If anyone has other suggestions that would be appreciated.