Right, this is a Relay, but the 2.2 100 PUMA engine.
Quick question is should there be rail pressure with ignition on, system primed, engine off, or does it only build once I start cranking the engine ?
I know it sound daft but still working out components/relation/sequence. I had thought pressurising the rail was part of the priming.
Longer story this was a snapped timing chain, engine stripped and head off, rebuilt and started with new injectors. Tried the injector code and learn, failed for unstable pressure.
tried pump learn, failed and threw up a P2635 fuel flow regulating electrovalve. changed the regulator, pressure valve and sensor, didnt help.
diagbox shows no pressure till engine starts cranking and jumps around from 190 bar to 450 bar while running.
so thinking about next steps, but the zero pressure at prime is throwing me a bit.