Since you're getting spark but the engine won't start, the problem is almost certainly fuel-related, even without a dedicated shutoff switch. Here's a breakdown of where to look:
* Fuel Pump: The most likely culprit. The pump may be failing (weak or not running), or there could be a problem with the fuel pump relay or the pump's wiring. You'll need to listen carefully near the fuel tank (usually under the van) for the whirring sound of the pump when you turn the ignition key to the "on" position (but not cranking). If you don't hear it, that's a strong indicator of a fuel pump problem.
* Fuel Filter: A clogged fuel filter will restrict fuel flow. It's relatively inexpensive and easy to replace, so it's worth checking. It's usually located along the fuel line between the tank and the engine. Consult your owner's manual or a repair manual for its exact location.
* Fuel Pressure: If you can, borrow or rent a fuel pressure gauge to check the pressure at the fuel rail. This will definitively tell you if the fuel pump is delivering sufficient fuel. The specifications for the correct fuel pressure can be found in a repair manual.
* Fuel Injectors (Less likely, but possible): While less common than the fuel pump or filter issues, clogged or faulty fuel injectors can prevent fuel from reaching the combustion chamber. Diagnosing this usually requires specialized tools and a bit more mechanical knowledge.
* Inertia Switch: Some Ford vehicles of that era had an inertia switch (a safety device that cuts fuel in a collision). Check your owner's manual for its location; it's usually under the dash. Push the switch to reset it—it might be the culprit if you were in a recent minor accident.
Finding the Fuel Pump: The fuel pump on a 1987 Econoline is usually located inside the fuel tank, requiring tank removal or dropping the tank to access it. This is a more involved repair.
Recommendations:
1. Start with the easiest: Listen for the fuel pump. Check the fuel filter. These are the quickest checks to perform.
2. Consult a Repair Manual: A Haynes or Chilton repair manual for your specific year and model van will be incredibly helpful. It will have diagrams showing the location of components, wiring diagrams, and troubleshooting guides.
3. Professional Help: If you're not comfortable working on your vehicle's fuel system, take it to a qualified mechanic. Fuel system work can be dangerous if not done correctly.
Remember safety first! Work in a well-ventilated area and never work near an open flame when dealing with fuel systems.
