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Home >> Nissan-Datsun >> 1990 >> 300ZX Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes >> Engine Stall >> After Deceleration

After Deceleration

  1. Check fast idle system. See IDLE CONTROL SYSTEM in SYSTEM/COMP TESTS article.
  2. Inspect throttle body ports and valves for deposits, wear or plugging. Clean or replace as necessary.
  3. Ensure engine has adequate compression.
  4. 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.
  5. Check for spark using spark tester.
  6. Ensure fuel pressure is within specification.
  7. Disconnect exhaust gas sensor and monitor change in driveability. If it improves, replace sensor. If not, go to step 11).
  8. Check ECU harness connector.
  9. 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.
  10. Try a known good ECU.
  11. Enter self-diagnostic Mode II and monitor exhaust gas sensor operation.
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