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Home >> Nissan-Datsun >> 1990 >> 300ZX Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes >> Hard Start/Will Not Start >> Normal Conditions
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Normal Conditions

  1. Ensure battery is fully charged and maintains at least 9.6 volts during cranking.
  2. Ensure fuel pressure is within specification.
  3. Perform appropriate test in INJECTOR MALFUNCTION diagnostic chart in SYSTEM/COMP TESTS article. Use DIAGNOSTIC CHARTS DIRECTORY table in SYSTEM/COMP TESTS article to locate chart.
  4. Check for spark using spark tester.
  5. Check spark plug for improper gap or fouling.
  6. Check EGR control valve operation.
  7. Check ECU harness connector.
  8. Check ECU power source and ground circuit. See ECU POWER SOURCE & GROUND diagnostic chart in SYSTEM/COMP TESTS article. Use DIAGNOSTIC CHARTS DIRECTORY table in SYSTEM/COMP TESTS article to locate chart.
  9. Try a known good ECU.
  10. Check timing belt for proper installation.
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