Why Pouring Gas into the Throttle Body Makes it Start:
* Direct Fuel Injection: When you pour gas into the throttle body, you're essentially bypassing the fuel delivery system. The engine is receiving a direct and immediate fuel source, allowing it to start. This confirms that the problem isn't with the ignition system (spark plugs, distributor, etc.).
Possible Causes of the Fuel Delivery Issue:
1. Fuel Pump Failure: The fuel pump is responsible for drawing fuel from the tank and sending it to the engine. If the fuel pump isn't working, no fuel will reach the engine.
* Test: Listen for the fuel pump's humming sound when you turn the ignition key to the "on" position (not starting). If you don't hear it, the pump might be faulty.
2. Fuel Filter Clogged: A clogged fuel filter restricts fuel flow, preventing enough fuel from reaching the engine.
* Test: The fuel filter is usually located near the fuel tank or near the engine. Check its condition and consider replacing it if it's old or dirty.
3. Fuel Lines/Hoses Cracked or Leaking: Cracked or leaking fuel lines can cause fuel leaks and prevent proper fuel delivery.
* Test: Inspect the fuel lines for any cracks, leaks, or signs of deterioration.
4. Fuel Pressure Regulator Malfunction: The fuel pressure regulator controls the fuel pressure in the fuel lines. A faulty regulator can either deliver too much or too little fuel pressure, preventing the engine from starting.
* Test: This requires a fuel pressure gauge to measure the pressure at the fuel rail.
5. Fuel Injector Issues: Clogged or faulty fuel injectors can prevent fuel from being sprayed into the cylinders, leading to a no-start condition.
* Test: This often requires professional diagnosis and potentially injector cleaning or replacement.
Important Notes:
* Safety First: Gasoline is flammable. Work in a well-ventilated area and avoid any open flames or sparks.
* Professional Help: If you're not comfortable diagnosing these issues yourself, it's best to take the Astro Van to a trusted mechanic for professional diagnosis and repair.
Let me know if you have any other questions about your Astro Van!
