Here's what you need to know to find the fuel pressure regulator:
1. Identify your engine: Check your vehicle's documentation (owner's manual, VIN plate) or look for an engine code stamped on the engine itself to determine the exact engine size and type.
2. Location: Generally, in many GM vehicles of that era, the fuel pressure regulator is *integrated into the fuel rail*. This means it's not a separate component you can easily replace independently. The fuel rail is located on the intake manifold, near the fuel injectors.
3. Visual Inspection (Once you know your engine): With the engine off and cool, locate the fuel rail (a metal bar with fuel injectors attached). The fuel pressure regulator is usually part of this assembly. It may have a vacuum hose connected to it.
4. Repair/Replacement: If you suspect a problem with the fuel pressure regulator, the entire fuel rail assembly may need to be replaced, or in some cases, just the fuel pressure regulator within the rail can be rebuilt/replaced. This is a job best left to someone with experience working on fuel systems due to potential fire hazards.
In short, you won't find a standalone fuel pressure regulator like in some older vehicles. It's integrated into the fuel rail. You'll need to consult a repair manual specific to your 1994 Chevy S10 Blazer's engine for exact diagrams and instructions. A parts store such as AutoZone, Advance Auto Parts, or NAPA can provide diagrams and potentially parts if you provide them with your vehicle's information (VIN is best).
