I have a ms1 v3 on an S5 6 port turbo. The car was running fine a week ago. Now the trailing coil isnt igniting but the trail is igniting. I swapped out the coil into another car and the other car fired fine So it isnt the coil. I was wondering if anyone had any ideas. I just let it sit a week while I waited and changed the throttle cable.

 

Check the transistor that fires the leading. I think it's the one that connects to D14. I had this go out on me and swapped out like 3 different coilpacks thinking it was the coilpacks. Give that a try.

 

Check the pullup resistor on D14, and the transistor that turns on that LED.

Ken

 

I am an idiot its the trailing not firing not the lead :s

 

with the MS1 code, the trailing doesn't fire below 700ish RPM IIRC... make sure you're spinning faster than this

 

Ahh yeah, forgot about that, it's been a couple years since I used MS1!

Ken