Yep, it's the standard 1 3 4 2 configuration. i.e. when 1 is on compression stroke, 4 is on exhaust (same goes for 2 & 3). So, when 1 is on compression, that is when the injector for 1 should open and fuel be injected. With the wiring as it is, this would also inject fuel into cylinder 4 that is...