Pressure Test: Electrical
NOTE:
The following is only a general procedure. For specific manufacturer's electric fuel pump testing procedures, see FUEL INJECTION article in this section.
- Most vehicles use a fitting to allow pressure test without separating fuel lines. If not, separate fuel line from injector inlet "T". Install a "T" connector with a pressure gauge in the line and reconnect line to injector.
- Hold pressure gauge about 16" (406 mm) above fuel pump. Pinch off fuel return line (if equipped) using care not to damage hose. Start engine and observe pressure.
- After pressure check, reconnect steel line. If pressure is not within specifications or varies greatly, replace fuel pump.