Listed in your owner's manual and under the hood on a placard.
Does it turn over? Does it have spark? Fuel?
Diesel fuel injection injects fuel into air that is hot enough to ignite the fuel. Spark ignition takes a fuel air mixture mixed and then drawn into the cylinder before ignition, then ignites with an electric spark.
Not enough info in question; howver, if you have a carbeurator, then the choke needs to be WD40'd (or repaired). If you have fuel injection, then it's probably water in fuel. -DRS.
yes
TBI or Throttle Body Injection
yes
Unless you have fuel injection.
The 1991 Nissan 320 Turbo does not have a choke. The engine has electronic fuel injection. There is not a need for a choke with electronic fuel injection systems.
Yes, both the 3.0 and the 4.0 are fuel injected.
Fuel pump?
No, it has a throttle body fuel injection system instead.
0.035"