How much pressure need the fuel pump on a 92 Chevy blazer?

The fuel pressure for a 1992 Chevy Blazer depends on the engine. There's no single answer. You need to know the specific engine (e.g., 4.3L V6, 5.7L V8, etc.) to determine the correct fuel pressure specification.

To find the correct fuel pressure, consult your vehicle's repair manual or a reliable online source like a repair database specific to your Blazer's year, make, and model, *and engine*. These resources will give you the factory-specified fuel pressure range for your particular engine.