9. With normal start, unstable idle speed or flameout under partial load (with A/C on, etc) Common trouble location: 1. A/C system; 2. Idle speed regulator; 3. Fuel injector Diagnosis Flow Table 1-75 97 S/N Operation Test Results Actions 1 Check if the accelerator cable is locked or over tightened. Yes Adjust No Next step 2 Check the air intake system and the connected vacuum pipe for leakage. Yes Check and repair air intake system No Next step 3 Remove the idle speed regulator. Check the throttle body, idle speed regulator, and idle speed by-pass air way for carbon deposition. Yes Wash relevant parts No Next step 4 Disconnect the coolant temperature sensor and start the engine.
Check the idle speed of the engine. Is it too fast? Yes Replace sensor No Next step 5 Check if the ignition timing of the engine can meet with standards. Yes Next step No Check and repair ignition timing 6 Connect the electronic injection system adapter. Turn on the ignition switch. Check the power supply of the pin 12#, 13#, 44#, 45#, 63#. Check the grounding of the pin 3#, 51#, 53#, 61#, 80#. Are they OK? Yes Diagnosis help No Check and repair relevant line