Pressure Regulator
- Disconnect battery negative terminal. Disconnect main fuel hose from fuel pipe. Connect pressure gauge between fuel main hose and pipe using a 3-way joint.NOTE: Cover hose with waste cloth since fuel is splashed out when disconnecting the hose.
- Connect battery negative terminal, and start engine. Disconnect vacuum hose connected to pressure regulator at pressure regulator control valve. Measure fuel pressure at idle. Pressure should be 35.6-37.0 psi (2.5-2.6 kg/cm2 ). Connect vacuum hose as it was, and measure fuel pressure. Pressure should be 28.4 psi (2.0 kg/cm2 ).
- If pressure is less than specified, check for bent or kinked fuel supply line, plugged fuel filter, plugged or bad fuel injectors, leaking pressure regulator and/or inoperative fuel pump.
- If pressure exceeds specification, check for kinked, bent or plugged fuel return line and/or defective pressure regulator.