Symptom Checks

Check the following items:

• Check ignition and fuel system. On LS models, see TEST KB , step 85)  under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V (GASOLINE) article. On all other models, see TEST A under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V (GASOLINE) article.
• Check if engine will start and run at part throttle. If engine starts and runs, Idle Air Control (IAC) system may be defective. See TEST KE , step 2)  under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V (GASOLINE) article.
• Check for restricted exhaust system. See TEST HF under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V (GASOLINE) article.
• Check engine mechanical condition. Check compression, camshaft, valve train components, etc. See appropriate article in ENGINES. If no problems are indicated, return to SYMPTOM DIAGNOSIS  to identify any additional symptoms or see TEST Z under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V (GASOLINE) article and check for intermittent faults.