1. Verify the New Components:
* Fuel Pump Installation: Double-check that the new fuel pump is installed correctly. A common mistake is incorrect connection of the electrical connector or improper seating of the pump in the tank. Make sure the fuel pump's electrical connections are secure and free of corrosion.
* Fuel Pump Relay: Even with a new relay, verify it's functioning correctly. You can swap it with another relay (of the same amperage rating) to see if that solves the problem. A multimeter can also test whether the relay is switching properly when the ignition is on.
2. Check for Power and Ground:
* Power at the Fuel Pump: With the ignition ON, use a multimeter to check for power at the fuel pump's connector. You should see battery voltage (12V). If not, trace the wiring back from the pump to the relay and then to the fuel pump relay circuit in the fuse box. Look for broken wires, corroded connections, or blown fuses.
* Ground Connection: A poor ground can prevent the pump from working. Inspect the ground wire connected to the fuel pump and ensure it's clean and securely fastened to a good ground point on the car's chassis.
3. Check the Fuel Pump Inertia Switch:
* This safety switch shuts off the fuel pump in the event of a collision. Locate the inertia switch (often under the dash or in the engine compartment) and check if it's tripped. There's usually a reset button.
4. Check the Fuel Filter:
* A clogged fuel filter will restrict fuel flow, even with a new pump. Replace the fuel filter. It's a relatively inexpensive part and a quick check.
5. Check Fuel Pressure:
* This requires a fuel pressure gauge. You'll need to connect it to the fuel system (usually at the fuel rail). With the ignition ON, you should see a specific fuel pressure (consult your owner's manual or a repair manual for the correct specification). Low or no pressure indicates a problem beyond the pump and relay.
6. Check the Fuel Lines:
* Inspect the fuel lines for kinks, cracks, or blockages. Make sure they are properly connected.
7. Check the Crankshaft Position Sensor (CKP):
* Some cars won't activate the fuel pump unless the CKP sensor is working correctly, as it signals the engine is trying to crank.
8. Consult a Repair Manual:
* A repair manual specific to your 1994 Oldsmobile Cutlass Ciera will provide detailed diagrams of the fuel system, wiring diagrams, and troubleshooting steps. This is invaluable for diagnosing these kinds of problems.
Important Safety Note: Gasoline is highly flammable. Work in a well-ventilated area and avoid sparks or open flames.
If you've checked all these and still have no fuel, it's time to seek professional help from a qualified mechanic. They have the tools and expertise to diagnose more complex issues.
