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Home >> Nissan-Datsun >> 1990 >> Sentra Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes >> Hard To Start >> After Warm-Up

After Warm-Up

  1. Monitor vehicle's tachometer while cranking engine (at least 250 RPM).
  2. Ensure battery is fully charged and maintains at least 9.6 volts while cranking.
  3. Cool fuel lines with wet rags and try to start engine (vapor lock).
  4. For Coolant Temperature Sensor & Airflow Meter: Enter self-diagnostic Mode III and retrieve codes. If vehicle will not start, crank engine before entering self-diagnostic Mode III.
  5. For Crank Signal: Enter self-diagnostic Mode IV and perform appropriate switch tests.
  6. Check vacuum supply to vacuum hose of fuel pressure regulator. Ensure hose is not plugged. Perform FUEL PRESSURE REGULATOR SOLENOID diagnostic chart (if equipped) in SYSTEM/COMP TESTS article. Use DIAGNOSTIC CHARTS DIRECTORY table in SYSTEM/COMP TESTS article to locate chart.
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