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No Combustion

  1. Monitor vehicle's tachometer while cranking engine (at least 250 RPM).
  2. 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.
  3. Perform appropriate INJECTOR MALFUNCTION diagnostic chart in SYSTEM/COMP TESTS article. Use DIAGNOSTIC CHARTS DIRECTORY table in SYSTEM/COMP TESTS article to locate chart.
  4. Connect inductive timing light to spark plug wire and check for weakness in flash.
  5. Ensure spark plug wires are within allowable resistance values.
  6. Check for spark using spark tester.
  7. For Code 11: Enter self-diagnostic Mode III and retrieve codes. If vehicle will not start, crank engine before entering self-diagnostic Mode III.
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