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Home >> Dodge and Ram >> 2002 >> Ram Van B2500, Van Cargo, 5.9 Z >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures - Gasoline >> DRIVEABILITY Problems >> Start & Stall Condition >> Testing

Start & Stall Condition: Testing

  1. Turn ignition on. Using scan tool, check for Diagnostic Trouble Codes (DTC). If no DTCs are present, go to next step. If any DTCs are present, perform appropriate diagnostic test. See appropriate SELF-DIAGNOSTICS article.
  2. Using scan tool, check for Central Timer Module (CTM) DTCs. If no CTM DTCs are present, go to next step. If any CTM DTCs are present, perform appropriate test. See appropriate BODY CONTROL MODULES article.
  3. Turn ignition on. Using scan tool, monitor TPS VOLTS while slowly depressing throttle pedal from idle position to wide open throttle position. If voltage changes smoothly, go to next step. If voltage does not change smoothly, replace TP sensor.
  4. Ensure throttle is fully closed and against throttle stop. Using scan tool, read TPS VOLTS. If voltage is 0.92 volt or less, go to next step. If voltage is more than 0.92 volt, check for binding throttle linkage. Repair linkage as necessary. If linkage is not binding and throttle is fully closed, replace TP sensor.
    5. NOTE: The following procedure assumes that the cooling system thermostat is functioning properly. Test works best if performed on a totally cold engine (cold soak).
  5. Turn ignition on. Using scan tool, read Engine Coolant Temperature (ECT) sensor value. If engine coolant temperature is more than 180°F (82°C), allow engine coolant temperature to cool down to 150°F (66°C) before proceeding. If engine coolant temperature is 150°F (66°C) or less, start engine and monitor scan tool until engine coolant temperature reaches 180°F (82°C). If ECT sensor value increases smoothly, go to next step. If ECT sensor value does not increase smoothly, replace ECT sensor.
  6. Check the following additional items as possible causes for start and stall condition:
    • Check for any technical service bulletins that may apply.
    • Engine exhaust system must be free of restrictions.
    • Engine compression must be within specification.
    • Engine valve timing must be within specification.
    • Engine must be free of vacuum leaks.
    • Throttle body must be free of carbon build-up and dirt.

    Repair any problems as necessary. If no problems exist, go to next step.

  7. Ensure fuel tank is not empty. Check fuel delivery. See FUEL PUMP PRESSURE TEST  under FUEL SYSTEMS. If problem is found, repair as necessary. If no problem is found, check for fuel contamination. Ensure fuel meets manufacturer's requirements. Replace fuel as necessary.
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