Hello everyone, I have been a member for a will but I have not posted in a while. I am putting a megasquirt v3.57 with an MS3X board on my rebuilt 13B. The coils are wired up but I am getting some weird sparks.

I am not getting anything from the leading coil, for this is there any way I can test the ignitor? the coil is fine but for some reason when I hook up 12V and a 12v signal to the wires nothing happens.

For the trailing coils this is where it gets weird. I hooked up the B/Y wires to 12v and when I put a signal to the red wire I get a spark on T1. If I put the signal to the white wire nothing happens. If I connect both the red and white wires to the same signal the T2 coil sparks.

Can anyone give me some advise on how to set this up.

Thank you for your time

Trevor

 

Do you have a stock harness you are trying to patch into, or are you trying to wire these up from scratch?

 

I made the harness from the MS3 and MS3X wiring looms. I used Aaron Cakes wiring diagram but I am using the MS3X board for the spark signal coil wires A, B, and C.

 

Wire A should be leading, B should be trailing IGt, C should be trailing coil select.

Since I've always just wired into the stock harness for that part of things, I couldn't tell you what color the wires on the coilpacks themselves are.

 

That is how I wired is up. Then the trailing coil is working correctly? What about the leading coil? How can I check to see if the ignitor on the leading coil is working properly? I only have 2 wires going to it, and a black wire from the ignitor that is putting out 12V. Is that black wire need to be connected to anything? I have read a lot of posts and no one ever mentions that wire.

Thank you

 

you check to see if its working correctly by taking the plug out, and leaving it someplace visible, ground the body of the plug, and turn her over.

do you get an rpm when cranking?

 

I know my trailing coil is working correctly but how do I check the leading coil ignitor?

 

Wire A is leading coil ground (which is how coil is triggered for ms3 ecu) and other should be 12v .
The black striped wire is 12v and the green striped is wire A on ms3