Fuel Pressure Check: Troubleshooting

NOTE: Before using the following flow chart, chart check to make sure that battery voltage is higher than 11 V. If battery voltage is low, pressure becomes lower than specification even if fuel pump and line are in good condition.

TROUBLESHOOTING PROCEDURES

Step	Action	YES	NO
1	Fuel pump operating sound check Remove fuel filler cap and then turn ON ignition switch. Can you hear operating sound?	Go to Step 2.	Go to FUEL PUMP AND ITS CIRCUIT CHECK .
2	Fuel pressure check Check fuel pressure referring to FUEL PRESSURE INSPECTION . Is check result satisfactory?	Go to Step 3.	Go to Step 6.
3	Fuel pressure check Start engine and warm it up to normal operating temperature. Keep engine speed at 4000 rpm. Does fuel pressure show about the same value as Step 2?	Go to Step 4.	Go to Step 8.
4	Fuel line check Check fuel pipe, fuel hose and joint for fuel leakage. Are they in good condition?	Go to Step 5.	Repair or replace defective part.
5	Fuel line check Check fuel pipe, fuel hose and joint for damage or deform. Are they in good condition?	Fuel system is in good condition.	Repair or replace damaged or damaged part.
6	Was fuel pressure higher than specification in Step 2?	Go to Step 7.	Go to Step 8.
7	Fuel line check Check fuel pipe, fuel hose and joint for damage or deform. Are they in good condition?	Faulty fuel pressure regulator.	Repair or replace damaged or damaged part.
8	Fuel line check Check fuel pipe, fuel hose and joint for damage or deform. Are they in good condition?	Clogged fuel filter, faulty fuel pump, faulty fuel pressure regulator or fuel leakage from hose connection in fuel tank.	Repair or replace defective part.