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No Replace fuel pressure regulator Yes Next step 14 When engine coolant is at low temperature, pull out electronic throttle body on harness and observe if engine revolution will rise. No Check electronic throttle body for damage Yes Next step 15 Put the ignition switch to “ON”. Check if voltage on the following pins of ECU is normal: if it is a battery voltage around 12V on 12#, 14#, 15# pins; if the voltage between 51#, 53#, 3#, 61#, 80# pins and the wire is zero. No Check wires and plugs Yes Next step 16 Check if ignition advance angle is normal. No Check other systems Yes Next step 17 Check if cylinder compression pressure of engine is normal, if low, add a little engine oil into each cylinder and re-measure if the cylinder pressure is normal. No Troubleshooting Yes Repair or replace 18 If air cleaner or airflow sensor is choked.
No Next step Yes Replace ECU 19 Check if the coolant temperature sensor is working correctly.
No Repair or replace
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