Manometer connection points
A. On a 2.7 liter engine: 1. Fuel supply pipe; 2. Gasket; 3. Pressure test kit
B. Location of the fuel regulator and distributor on V6 3.4L engines: the arrow indicates the plug
1. To perform the procedure described below, you will need a fuel pressure gauge with a hose rated for a pressure of at least 3 kgf / cm2. The hose end must be of type "banjo", i.e. sealed with a bolt with an internal through channel.
2. Check the battery voltage, unscrew the fuel tank cap and decompress the fuel system.
3. The fuel pressure can be checked at the indicated locations.
4. Move the automatic transmission selector to Park, or place the manual transmission in neutral.
5. Turn the ignition key to the ON position and read the pressure. Compare with the norm.
6. If the pressure is above normal, then check the cleanliness of the return fuel line. If there is no blockage, replace the pressure regulator.
7. If the pressure is low, pinch the return hose. If the pressure rises, replace the pressure regulator. Otherwise, check the gasoline supply line, fuel pump and filter.
8. Start the engine and determine the fuel pressure at idle. If the pressure is abnormal, check the condition of the vacuum hose and pressure regulator (see subsection 5.3.3).
9. Stop the engine and check that the fuel pressure is maintained at 1.35 kgf/cm2 within 5 minutes after stopping. If the pressure drops faster, then the cause may be a leak in the fuel pump, pressure regulator, or injector.