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Hard Start/Will Not Start: Hot

  1. Ensure fuel pressure is within specification.
  2. Remove vacuum hose from fuel pressure regulator and monitor for symptom change.
  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 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.
  6. Try a known good ECU.
  7. Check timing belt for proper installation.
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