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12.15 Poor Performance and Disability when Accelerating.
Yes Repair 1 Check if failure occurs, such as clutch slipping, low tire pressure, brake delay, wrong tire size and incorrect four-wheel alignment. No Next step Yes Next step 2 Check if the electronic throttle can be full opening.
No Repair or replace the throttle Yes Remove the failure displayed 3 Put the ignition switch to “ON”. Use a failure diagnostic tester to check if any failure information record exists. No Next step Yes Next step 4 Let engine run at idle speed, after coolant temperature reaches normal value, then use a diagnostic tester to check the ignition advance angle. No Check the parts involved Yes Next step 5 Put the ignition switch to “ON”. Check if it is break or short circuit between 38#, 32#, 54#, 36# pins on ECU connector and 1#, 2#, 4#, 6# pins of throttle position sensor of electronic throttle valve body. check if the voltage between 17# and 42# pins of ECU, between 39# and 17# pins of ECU (signal output terminal of intake air temperature sensor and coolant temperature sensor) as well as 64#, 65#, 66#, 67# pins of ECU (for control of DC motor) is normal. No Repair or replace Harness
Yes Next step 6 Run the engine at idle speed and check if the air intake pressure is from 35 to 65kPa. No Overhaul
Yes Next step 7 Connect fuel manometer valve. Short 30# and 87# pins of fuel pump relay to make the fuel pump run, and then check if fuel pressure is around 400kPa. No 11 Yes 10 8 Use a special joint to directly provide a 12V power supply and intermittent ground wire from battery to injector and check if the injector can work intermittently. No Next step Yes Next step 9 Clean out the fuel injector and look if it can work correctly.
No Replace fuel injector Yes Replace fuel 10 Check if fuel is deteroprated or moisture.
No 16 Yes Next step 11 Check if the fuel pressure value is below 300 kPa.
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