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Make sure of fuel leak when fuel pressure gauge is installed for low pressure fuel system. Make sure of fuel leak after reassembling fuel hose quick-connector.

If fuel pressure of low pressure fuel system is low and engine stalls (vehicle is being stopped) although fuel pump is operated and fuel is supplied, Inspect hose leak of fuel pump in the fuel tank.

Install pressure gauge of low pressure fuel to the fuel hose quick-connector (filter side) and block the fuel hose quick-connector (engine side) using plug.

☞ Make sure of using low pressure gauge (CRT-1051), gauge connection tube (CRT-1052), connection adapter(CRT-1053), fuel filter plug (CRT - 1055).

note

Refer to "CRT-1000 Tester composition" of detail inspections (Equipment settings).

Operate the fuel pump by turning IG key "ON" or by connecting jump wire directly after removing the fuel pump relay.

☞ Low fuel pressure will be increased within approx 2 seconds after turning IG KEY "ON".

Check the low fuel pressure. (Pressure must be increased to relief pressure of the fuel pump.)

■ Specification : Approx. 7.0 ~ 7.5 bar at IG key "ON"

Symptom		Inspection procedure
Case1	● Low fuel pressure is NOT increased to relief pressure of the fuel pump or Low fuel pressure is released rapidly after stopping operation of fuel pump.	● If there is no leak, Inspect fuel hose damage, disconnection of the fuel pump in the fuel tank and block of the pump strainer.
Case2	● Low fuel pressure is increased to relief pressure but rising time of pressure is too slow.	● Go to "Fuel filter inspection" procedure.
Case3	● Fuel pressure is higher than relief pressure (7.5 ~ 8.0 bar) or Low fuel pressure is released rapidly after stopping operation of fuel pump.	● Replace the low pressure fuel pump. (Relief valve in the fuel pump is stuck.)