Where is the rear main injector located at in a 1991 Nissan 300zx?

In a 1991 Nissan 300ZX, the rear main fuel injector is located on the intake manifold, towards the rear of the engine, near the firewall. It is part of the V6 engine's fuel injection system and is accessible by removing the intake plenum. Proper access may require the removal of other components, so ensure to follow the appropriate service manual guidelines for disassembly.