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Yes Next step 13 Check if the fuel pressure value is below 300kPa. No 17 Yes Next step 14 Close the fuel manometer valve. Re-engage the ignition switch to let the fuel pump run for a period of time, and then check if fuel pressure can be built up. No 16 Yes Replace fuel pressure regulator 15 Open the valve of fuel gauge and clamp the oil return pipe by oil return baffle so that the oil can not return. Check if the oil pressure occurs immediately. No Repair and replace fuel injector and oil pipe Yes Repair or replace oil return pipe 16 Check if there is leaking or jam in oil intake pipe. No Replace oil pump Yes Repair or replace oil return pipe 17 Check if the oil return pipe is bended or jammed. No Replace fuel pressure regulator Yes Use detergent to wash 18 Check the pressure of air intake pipe and if the sense port of air intake temperature sensor is jammed. No Next step Yes Next step 19 Let engine run at idle speed, after coolant temperature reaches the active temperature of closed loop control, observe if the oxygen sensor works normally (rapidly fluctuate between 0.1V and 0.9V). No Check the oxygen sensor and harness Yes Remove leakage
20 Check if the engine air intake system is leaky. No Next step Yes Next step 21 Check if the pressure of cylinder is normal. No Troubleshooting Yes Replace ECU 22 Let engine run at idle speed, after coolant temperature reaches normal value, then use a special diagnostic tester to check if ignition advance angle is within the standard scope. No Check other part
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