Originally Posted by
gcfcos
Everyone I've worked on and owned once it gets to a certain pressure the pump just sort of clicks as it's up to pressure enough to start it. Just had this on my mates saph that wouldn't start and he thought it was the fuel pump but wasn't as it had already primed and wouldn't run anymore untill it started.
The ECU has no conception of the FP, so what you are saying is impossible!
The duration of the prime can vary with temperature, none the less it will always prime.
Martin