Does anyone know the psi for an efi fuel pump

around 2 1/2 psi the carbys float closes off the fuel supply the pressure rises and the pump stops, volume is more important then pressure to keep the carbys float chambers full.

if it is a carby, the problem is the carby
if it is EFI pumping is useless so have the codes read to define the fault area

You should hear a low whirl from the fuel pump when the key is turned to run, do you hear that? The fuse would be under the seat or under one of the side covers. Your owner's manual is the best source of location info of fuse.

if it is EFI , the pressure will be up to 65 psi
if carby the pressure to the carby will be around 10 psi

if it is a carby model , have the carby overhauled and cleaned out
replace all the rubber fuel lines as they may appear good from the outside but internally they fall apart placing rubber bits in pump valves and carby jets
if an efi model have a shop read the fault codes

turn key on but not start engine pressure should be 48 to 55 psi

For carbureted, 4-5 PSI. For EFI, around 35-60 PSI. When testing, do NOT dead-head the fuel line on the EFI version for more than a flash. You will destroy the fuel pump.

1987 Nissan Stanza

you will need a repair manual
http://www.nicoclub.com/service-manual?fsm=Stanza/Sanza_1989_FSM

comes up as having both efi or carby what has yours got

if carby its a lot easier to bypass the faults to get it to run

will assume its EFI

EFI will be a problem if any wires have shorted
may have blow the large fuses in the engine bay giving power to the car


for both carby and EFI
pull the light fuses and relays out

check all fuses and relays in the engine bay cluster are not popped

starter relay and EFI ecu fuse are in the engine bay cluster

if the motor turns over
the fuel pump must be pumping fuel with pressure required to run the car to get fuel to the carby /or fuel rail and injectors
if you get that
only have to worry about spark
have you got a good coil arc and spark to all plugs

I would change the fuel pressure regulator first, if no change in pressure the fuel pump is on the way out.I have a 01 silverado 4.8 and my fuel pressure is between 55and60 psi.

Is it EFI or carby?

EFI, is ther an injector pulse and spark?

carby, does the oil pressure light come on before cranking?