Check For External Leakage
WARNING: This page is about a different car, the 1995 Ford RV Cutaway, 1995 Ford Econoline, 1995 Ford Cutaway, and 1995 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.
With engine running, visually inspect for leakage of fuel, engine oil and coolant. Ensure air cleaner is properly installed and dirt is not getting past element. If no leakage is found, go to next test. If leakage is found, repair or replace faulty component(s) as necessary and go to next test.