1. Fuel Pump: This is the most common cause. The pump might be failing to deliver sufficient fuel pressure, or it might be completely dead.
* Check the fuel pump relay: Locate the fuel pump relay (consult your owner's manual or online resources for its location). You can try swapping it with a known good relay of the same amperage. If the truck starts and runs, you've found your problem.
* Listen for the fuel pump: Have someone turn the ignition key to the "on" position (without cranking the engine). You should hear a whirring sound from the fuel pump in the tank for a few seconds. If you don't hear it, the pump may be faulty or the relay isn't activating it.
* Check fuel pressure: This requires a fuel pressure gauge. You'll need to connect it to the fuel rail (be cautious – fuel is flammable!). The pressure should be within the specifications listed in your owner's manual. Low or no pressure points to a failing fuel pump, clogged fuel filter, or a problem in the fuel lines.
2. Fuel Filter: A clogged fuel filter restricts fuel flow.
* Replace the fuel filter: This is a relatively inexpensive and easy fix. It's always a good idea to replace this part periodically anyway.
3. Crankshaft Position Sensor (CKP) or other Sensors: These sensors tell the engine's computer the position of the crankshaft. A faulty sensor can prevent the engine from running consistently. If the engine is getting fuel and still not running, a bad sensor could prevent ignition.
* Testing these requires a multimeter or a scan tool to check for proper sensor output. It's usually best to replace them based on symptoms.
4. Fuel Injectors: Clogged or faulty fuel injectors can prevent fuel from reaching the combustion chamber.
* Testing fuel injectors requires specialized tools and knowledge. It's best to have a mechanic diagnose this.
5. Ignition System: While less likely given the starter fluid temporarily works, issues with the ignition coil, distributor cap, rotor, or spark plugs could also contribute to the problem.
* Inspect the distributor cap and rotor for cracks or wear.
* Check the spark plugs for proper gap and condition. They should be replaced periodically.
6. Pick-up Coil in Distributor (older style ignition): This coil sends the signal to the ignition module to fire the coil. If you have a distributor, this part may be the problem.
Troubleshooting Steps:
1. Start with the easiest and cheapest: Check the fuel pump relay and replace the fuel filter.
2. Listen for the fuel pump: This helps narrow down the fuel delivery issue.
3. If the problem persists, check fuel pressure. This is a more definitive test for fuel pump/delivery issues.
4. If fuel pressure is good, consider ignition components.
5. If you're not comfortable with any of these steps, take it to a mechanic. Diagnosing fuel delivery issues can be challenging, especially without the proper tools.
Important Safety Note: Gasoline is highly flammable. Always work in a well-ventilated area and avoid sparks or open flames when working on your fuel system. If you are unsure about any of these steps, consult a qualified mechanic.
