F6a efi wont start

The Suzuki F6, F6A, 6 valve, and 12 valve engines do not necessarily use the same carburetor. The carburetor used on a particular engine depends on factors such as the engine's displacement, number of cylinders, and year of manufacture.
For example, the Suzuki F6A engine, which was used in various Suzuki vehicles such as the Suzuki Carry and Suzuki Jimny, has several different carburetor options depending on the model year and vehicle application. Some of the carburetors used on the F6A engine include the Hitachi DM14, DM20, and DM24 carburetors, as well as the Suzuki F5A and F8B carburetors.
Similarly, the Suzuki F6 engine, which was used in the Suzuki Cappuccino sports car, also has a specific carburetor designed for its engine configuration.
Therefore, it's important to confirm the exact engine model and year of manufacture, as well as the vehicle application, to determine the correct carburetor for a particular engine.

welcome to usa forum .
where are you, , ?
we dont have F6a here.
so asking the oil volume of an F6a engine.
well , put back what came out?
measure it?
or google that engine and pray it pops up?
what car? is this. what year, books are INDEXED by
year
Car name,
engine F6a
and country.
we dont have these cars here.with that engine.
its motor cycle sized to us.

You could have gas fouled the plugs. If you pulled on and it is wet, it is fouled. Replace them.

double posted
and no gas engines starts with no spark.
back up one post, and see long answer.
i posted all steps.
do the tests, or guess. its your choice.

leaking where.
and carbon where.?
pretend we are blind, (we are)

Most of the time an engine that backfires is out of time. I would
check this first, as this is the problem 95% of the time. It could
also be bad fuel, a bad catalytic converter (rare) A bad coil or igniton module will definatly cause it. A fuel injector that is spraying excessive
fuel out will cause an engine to backfire. Burned or leaking
valves will cause it (rare).

check the earth lead from the battery to the engine as these can come loose.

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 think gas is not getting to your fuel rail.

Could be the fuel pump. To access it you will have to remove you rear seat and take off an oval shaped plate. There you can remove it and replace the pump.

if battery is good and connected fine, maybe the EFI fuse 15amp is burn