Update on this, the nozzle was not protruding into the intake and was dribbling rather than spraying. I, like others, conclude that this was dead heading the pump, akin to a blockage. The controller sees a pump voltage difference hence the error light.
where I’d constantly cut and inserted the hose into the aem solenoid I had an error light at the controller and failsafe triggered once again. Pipe was leaking and spraying fluid under the bonnet. Now changed the solenoid pipe fittings for compression fittings, no leaks.
the controller again noticed a voltage anomaly due to the leak.
so although it doesn’t actually monitor flow it knows about base errors at the pump.
they used to list a flow sensor kit but it’s been discontinued.
to cure my intake nozzle issue I fitted a cp-e methcharge pipe and that’s done the trick, tuneplus recommended this and use this pipe on all their builds
