I'm having a weird issue with my MS build.
At first, it was missing on cyl 1 + 4. I pulled the COP and saw spark jumping to the valve cover so it is getting spark. What confuses me is that 1+3 and 2+4 get fuel together, so that made me think it's not a fueling issue.
I then found the thread about people having issues with hi-res and the 1k ohm resistors so I swapped them to the 270 ohm resistors like this diagram, as well as adding the capacitor as this diagram shows:
Heres a picture of my board before doing the cap and swapping resistors.
Tried it again and cylinder 1 was firing. Now its down to cylinder 4. This confused me as 1+4 fire together as wasted spark. I pulled the MS again and inspected the board. Found a short.
In the lower right where I have the red circle, the spark 1+4 wire was touching the bottom solder of the resistor that is right there but on top of the PCB.... R25 I believe.
Any idea what damage I may have done?
I need to fix this ASAP to get the race car running and tuned in time.
Thanks for any help you can provide.