Fuel Pressure Regulator
WARNING: This page is about a different car, the 1996 Suzuki Swift. However, it is still accessible from the selected car via links, so may be relevant.
Regulator is mounted on top of throttle body. If fuel pressure is not within specification, check fuel pump unregulated pressure. If unregulated pressure is within specification, check for clogged vacuum passage between intake manifold and fuel pressure regulator. If passage is clear, replace regulator.