If you suspect a problem with fuel delivery:
* Check the fuel pump relay: A faulty relay can prevent the pump from running. Locate the relay (your owner's manual or a reliable online resource like a repair manual specific to your 1990 Skylark will show you where it is) and try swapping it with a known good one of the same amperage.
* Listen for the fuel pump: When you turn the ignition key to the "ON" position (but don't start the engine), you should hear the fuel pump run for a few seconds. If you don't hear it, the pump itself might be faulty, the fuel pump fuse blown, or there's a problem with the wiring.
* Check the fuel pressure: This requires a fuel pressure gauge and is the most definitive way to know if the system has sufficient pressure. The correct fuel pressure for your Skylark's engine will be in a repair manual. Low pressure indicates a problem with the pump, filter, regulator, or possibly a leak.
* Check the fuel filter: A clogged fuel filter will restrict fuel flow. Replace it if it's dirty or old.
* Inspect the fuel lines: Look for any visible cracks, leaks, or damage in the fuel lines.
Important Note: Working with fuel systems involves flammable liquids. Always follow proper safety precautions, including disconnecting the battery negative terminal before working on the fuel system. If you're not comfortable working on your fuel system, take your car to a qualified mechanic. Improperly handling fuel can be dangerous.
