Hi I have just installed a Megasquirt 1 V3 Extra on my Eunos 1600 1990 and after lots of help from this Forum I eventually got it all up and running, so the decided to do the Joe Perez improved spark drive outputs circuits and now I am only firing on 2&3 and no spark on 1&4 so lost Spark A ??, I have checked and checked all my mods and wiring and soldering and can not find anything wrong so any help with tests etc I can do to locate problem will be much appreciated, Regards DM

 

keep looking; you messed up somewhere.