Fuel Pump - Fuel Pressure Test
2005 Tundra/Skandic/Expedition snowmobiles
Before proceeding to the pressure test ensure the battery is fully charged. Battery voltage must be over 12 volts.
Release the fuel pressure in the system using B.U.D.S. Look in the Activation tab.
WARNING
The pressure test will show the available pressure at the fuel pump outlet. It validates the pressure regulator, the fuel pump and leaks in the system.
Ensure there is no leak from hoses and fittings. Repair any leak.
Ensure there is enough gas in fuel tank. Disconnect outlet hose.
Remove plastic clip (P/N 275 500 429) from male fitting of pressure gauge (P/N 529 035 591).
Install the clip on male fitting of fuel rail inlet hose.
Install fuel pressure gauge (P/N 529 035 591) between disconnected hoses (in-line installation).
Install the tether cord cap. Activate the cut-out switch so the engine will not crank. Depress start button and observe fuel pressure. Release pressure using B.U.D.S. so that the gauge is "reset" to zero(0). Remove the tether cord cap and install it again. Repeat the test.
Crank or start engine and observe fuel pressure. The fuel pressure should be the same as above.
If pressure is within limits, fuel pump and pressure regulator are working adequately.
A rapid pressure drop indicates leakage either from the fuel rail or from the fuel pump check valve. Check fuel rail for leaks. If it is not leaking then replace fuel pump.
A slow pressure drop indicates leakage either from the fuel injector or from the fuel pressure regulator. Check fuel injector for leaks (see below). If it is not leaking then replace fuel pump module.
Release fuel pressure in the system using B.U.D.S. Look in the Activation tab.
Remove pressure gauge and plastic clip from inlet hose. Reconnect inlet hose.
WARNING
Reinstall removed parts.
Updated on: Friday, December 18, 2020