Strange one this, I still say you don't have to Bleed re K & KE injection, was with Bosch agent for 10 years..50 years Auto sparks on all cars / Trucks / Buses...never ever had to bleed through as with Diesels, so write some thoughts...you do have a good ignition spark I take it..do just run a check whilst turning over...if perfect, check the plugs are not soaked, ...yes you got a spray in the "Face" !!...but you would with 10/20psi, I would Test a better way, your going to have to as someone has Interfeared with the Timer / wiring " ground that " Brown wire you refer to, will comment on why that has been done later.....ide like you to remove the 5th injector from manifold complete with Pipe on, pop into a safe container, disconnect ignition coil...now crank engine..the 5th is on the main 85/90psi line, do you see a good spray [ must ]..if perfect as should be..why are we not getting a burst into life..4 sparks..must do. To now comment on why the 5th injector has been eliminated, proberly back in the past had or indeed still has a leaky injector [ one of the 4 ] so cranking on a Cold engine the leaking injector plus the 5th, all too much...soaked the plugs..someone found it easy to do away with the 5th and its Timer, but for sure yes starting OKish...but engine Idle not good..eratic..etc. hope all helps.. Peter.........thinking that non-standard Filter somehow keeping pressure low ??