RAPID RABBIT

iTrader: (10)

Hi,
i while ago i fitted a new sx fuel regulator and a walbro fuel pump. i noticed that the fuel pressure does not hold when the pump primes. it rise then falls to zero when pump stops. is this a fuel pump problem????

ukpaisley

iTrader: (4)

I am not 100% sure, but most cars have a return line , and a non-Return valve to keep the pressure. Maybe its still attached to the old pump carriage..

I haven changed mine yet, its the next job on my list.

P1Drifter

iTrader: (7)

leaky injector, split line ?

RAPID RABBIT

iTrader: (10)

there's no visible external leaks and i even bypassed the rail and it still drops. i suppose if i remove the return pipe and route it to a container i could tell if its the reg passing. how does the fuel pump keep pressure is there a non return valve?