1. The Obvious Checks:
* Fuel Level: This seems obvious, but ensure the tank actually has fuel.
* Fuel Pump Relay: This is a common failure point. Locate the relay (usually in the fuse box under the hood or inside the car) and try swapping it with a known good relay of the same amperage. If the problem disappears, you've found the culprit.
* Fuel Pump Fuse: Check the fuel pump fuse, also located in the fuse box. Replace if blown.
* Gas Cap: A clogged or improperly sealed gas cap can prevent the fuel tank from venting properly, hindering fuel flow. Try loosening it slightly.
2. Listening for the Fuel Pump:
* Turn the Key to "ON": With the ignition in the "ON" position (but not started), listen carefully near the fuel tank (usually in the rear of the car). You should hear a brief humming sound from the fuel pump as it primes. If you don't hear it, the pump may be faulty, or there's an electrical problem.
3. Checking the Fuel Lines and Filter:
* Visual Inspection: Inspect the fuel lines for cracks, kinks, or loose connections. Look for any signs of fuel leaks.
* Fuel Filter: The fuel filter restricts contaminants. A clogged filter will severely restrict fuel flow. Locate the filter (often near the fuel pump) and replace it. This is a relatively inexpensive part and a common cause of fuel delivery problems.
4. Testing the Fuel Pressure:
* Fuel Pressure Gauge: This requires a fuel pressure gauge to measure the fuel pressure at the fuel rail. The pressure should be within the specifications outlined in your Corvette's repair manual. Low or no pressure indicates a problem with the fuel pump, pressure regulator, or fuel lines. This is where a manual becomes indispensable.
5. Electrical System Checks:
* Wiring Harness: Check the wiring harness for any damage, corrosion, or loose connections between the fuel pump, relay, and ignition switch.
* Fuel Pump Wiring: Test the power and ground wires going to the fuel pump to make sure they are getting power when the ignition is turned on. A multimeter is needed here.
6. Fuel Pump itself:
* Pump Replacement: If all else fails, the fuel pump itself is likely the problem. Replacing it is usually a somewhat involved job, requiring tank removal or dropping the tank down.
Important Considerations:
* Repair Manual: A 1985 Corvette repair manual is incredibly helpful. It will provide wiring diagrams, specifications, and step-by-step instructions. A Haynes or Chilton manual are good starting points.
* Safety: Work in a well-ventilated area when dealing with fuel. Fuel is highly flammable. Disconnect the battery negative terminal before working on any electrical components.
* Professional Help: If you're not comfortable working on your car's fuel system, take it to a qualified mechanic.
By systematically going through these steps, you should be able to pinpoint the reason your 1985 Corvette isn't getting gas. Remember to replace parts with genuine or high-quality replacements. Good luck!
