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Geely Emgrand X7. Manual part - 60
– If the vehicle does not have a misfire when sent to a service station, road test the vehicle, so – If after a long period road test, ECM does not store any misfire associated DTC codes, then • Overfill fuel tank and fuel enters the evaporative emission control system, so that the • Use improper fuel caused poor combustion and misfire. • Contaminated spark plug causes the ignition failure and misfire. • Carry out basic inspections at fault locations identified by DTC codes. – Road test the vehicle after repair to confirm no DTC is stored. Step 1 Initial Inspection (a) Inspect the harness connector for damage, poor connection, aging or signs of loosening. (b) Inspect the vacuum tube for damaged, loose, leakage and so on.
Step 2 Inspect other DTC codes output. (a) Connect fault diagnosis tester to the vehicle diagnostic interface. (b) Turn ignition switch to ON position. (c) Press the fault diagnosis tester power button. (d) Select the following menu items: Engine/Read DTC codes. (e) Read DTC codes. Results DTC Codes Shown To Step DTC codes other than P0300 No DTCP0300 Yes
Step 3 Inspect the vacuum tube and the air intake system. (a) Inspect vacuum canister solenoid valve connection is correct or not and leakage. (b) Inspect the vacuum brake booster vacuum tube connection is correct or not and leakage. (c) Inspect the intake tube pressure sensor connection is correct or not and leakage. (d) Inspect the positive crankcase ventilation valve, ventilation pipe connection is correct or not and leakage. (e) Inspect whether there is any leakage in the intake system. Is there any above mentioned fault? No Refer to 2.2.7.14 DTC Chapter Index. Yes Next 239 |