Where is the oil pressure sensor sending unit on a 1990 Ford F-250 5.8 liter 5-speed gasoline truck?
The oil pressure sending unit on a 1990 Ford F-250 with a 5.8L engine and 5-speed transmission is located on the driver's side (left side) of the engine block, near the oil filter. It's a relatively small sensor, often with a single wire connected to it. You might need to consult a repair manual or a diagram specific to your engine to pinpoint it precisely, as the exact location can vary slightly depending on accessories and other components. The oil filter is a good landmark to start your search.