Possible Sources of the Leak:
* Fuel Injector(s): This is a common culprit. A failing injector seal can allow fuel to leak past the injector body. You might hear a ticking or clicking sound from the engine if this is the case.
* Fuel Filter Housing: A cracked or damaged fuel filter housing can lead to leaks.
* Fuel Lines & Fittings: Cracks or loose connections in the high-pressure fuel lines or fittings can also cause leaks. These are usually under high pressure, making the leak more significant.
* Injection Pump: A leak from the injection pump itself is less common but very serious and expensive to repair.
* Glow Plug System: Although less likely to cause a substantial diesel drip, faulty glow plugs or their wiring can leak a small amount of fuel.
* Fuel Tank: A leak in the fuel tank itself, or its connections is also possible but less likely to appear as a drip from under the engine unless the tank is exceptionally high up.
What You Should Do:
1. Safety First: Diesel fuel is flammable. Avoid any open flames or sparks near the leak. Do not run the engine until the leak is identified and repaired.
2. Locate the Leak: Try to pinpoint the exact location of the leak. Clean the area thoroughly to make the leak easier to see. You might need a flashlight and possibly even a mirror to see underneath.
3. Professional Diagnosis: Unless you have extensive mechanical experience with diesel engines, especially the 7.3 Power Stroke, do not attempt to repair this yourself. The high-pressure fuel system requires specialized tools and knowledge. A misdiagnosis or incorrect repair can lead to significant engine damage. Take it to a qualified mechanic specializing in diesel engines, preferably one familiar with Ford 7.3L Power Strokes.
4. Don't Drive It: Driving with a diesel leak is extremely risky due to the fire hazard and the potential for complete fuel system failure.
5. Gather Information: Before taking it to the mechanic, try to note the following:
* How much fuel is leaking? (A few drops or a steady stream?)
* Where exactly is the leak coming from? (Try to be as specific as possible.)
* When did you first notice the leak?
* Recent maintenance or repairs?
The cost of repair will depend heavily on the source of the leak. A leaking injector might be relatively inexpensive compared to a faulty injection pump, which could be a very expensive repair. The sooner you address this, the better, to prevent further damage and avoid potentially catastrophic failure.
