Where is the fuel pressure regulator on a 1990 E-150 Ford van?
On a 1990 Ford E-150, the fuel pressure regulator is typically integrated into the fuel rail. It's not a separate, easily identifiable component like on some other vehicles. You'll find the fuel rail on the top of the engine, near the intake manifold. The regulator itself will be a small part of that assembly, often not readily visible without removing some components or looking very closely.