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At All Times

  1. Check fuel pump operation. See appropriate FUEL PUMP diagnostic chart in SYSTEM/COMP TESTS article. Use DIAGNOSTIC CHARTS DIRECTORY table in SYSTEM/COMP TESTS article to locate chart.
  2. Monitor vehicle's tachometer while cranking engine (at least 250 RPM).
  3. Ensure battery is fully charged and maintains at least 9.6 volts while cranking.
  4. Advance and retard timing while attempting to start engine.
  5. Check canister purge hoses for leaks.
  6. Remove vacuum hose from fuel pressure regulator and monitor for symptom change.
  7. Ensure fuel pressure is within specification.
  8. Connect inductive timing light to spark plug wire and check for weakness in flash.
  9. Ensure spark plug wires are within allowable resistance values.
  10. Check spark plug for improper gap or fouling.
  11. Check for spark using spark tester.
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