i can't get my head round this so hoping someone can make sense of it for me. BT's running a twin fuel pump system with a 2litre swirlpot. The factory pump fills the swirl pot, then the external 300lph pumps from that to the engine. Both pumps are hardwired & independently switched.
with just the factory pump on she idles perfectly, but won't rev when you touch the throttle. Yet when you turn on the second (external) pump she revs happily but over-fuels very badly on idle. The injectors are standard oranges, & the fuel pressure regulator is the original so thought should be dumping any unwanted fuel back to the swirlpot
any ideas?
Bookmarks