If you don't have the owner's manual, you can find a digital copy online (often via a site like HelmsInc, but be aware some might charge). Alternatively, searching online for "[Your Blazer's Engine] 1994 Chevy Blazer Fuse Box Diagram" may yield helpful results with diagrams showing the fuse box layout.
Why a blown fuel pump fuse might cause starting and stalling:
If the fuel pump fuse is blown, the fuel pump won't receive power. This means the engine can start (on residual fuel in the lines), but it will quickly die out as soon as that fuel is used up.
Before replacing the fuse:
* Check the fuse visually: Before you start swapping fuses, carefully examine the fuse itself. Look for a broken filament inside the glass (or a blown section in a blade-type fuse). A blown fuse will often be obvious.
* Consider other causes: A blown fuse is *one* possibility, but a stalling engine could also be due to problems with:
* Fuel pump relay: This is a separate component that switches power to the pump. It's possible the relay is faulty, even if the fuse is good.
* Fuel pump itself: The pump itself could be failing.
* Crankshaft Position Sensor (CKP): A faulty CKP can prevent the engine from running consistently.
* Other sensors: Various engine sensors can contribute to stalling issues.
* Ignition system: Problems with the ignition coil, distributor (if applicable), or spark plugs/wires can also cause stalling.
If replacing the fuse doesn't resolve the problem, you'll likely need a professional mechanic to diagnose the underlying cause. Simply replacing parts until it works is usually expensive and inefficient.
