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Test NTC-20: Surge

  1. Using scan tool, read DTCs. If no DTCs are present, go to next step. If any DTCs are present, perform appropriate diagnostic test. See DTC & TEST IDENTIFICATION  table under DIAGNOSTIC TROUBLE CODE DEFINITIONS.
  2. Listen for injector operating sounds while cranking engine. If injectors are operating, go to next step. If injectors are not operating, check injector control circuit. Perform appropriate diagnostic test for injector in which operating sound is not heard. See DTC & TEST IDENTIFICATION  table under DIAGNOSTIC TROUBLE CODE DEFINITIONS.
  3. Perform TEST NTC-37: INSPECTION PROCEDURE WHEN SURGE OCCURS . Repair as necessary and recheck system operation. If symptom still exists, go to next step.
    4. CAUTION: Use caution when removing fuel plate from fuel rail, as residual fuel pressure may be released.
  4. Release fuel pressure. See FUEL PRESSURE RELEASE . Remove 2 bolts retaining fuel plate to end of fuel rail and remove fuel plate. Attach fuel pressure gauge with Hose Adapter (MD998742) and Adapter Hose (MD998709 ). Install fuel pressure gauge, hose and adapter between fuel rail and fuel plate. Turn ignition on. Using scan tool, select FUEL SYSTEM TEST and note fuel pressure. This will activate fuel pump and pressurize fuel system. Ensure fuel does not leak from connections at fuel pressure gauge, hose and hose adapter. Start engine and allow to idle. Fuel pressure should be 47-50 psi (3.3-3.5 kg/cm2 ). Raise engine RPM several times. Ensure fuel pressure at idle does not drop. Turn ignition off. Release fuel pressure and remove test equipment. If fuel pressure is as specified, go to step  6. If fuel pressure is not as specified, go to next step.
  5. If fuel pressure is low, drops after raising RPM or no fuel pressure is present in fuel return hose, check for plugged fuel filter, fuel leaking to return side due to poor fuel regulator valve or weak spring (faulty fuel regulator), or low fuel pump delivery pressure (faulty fuel pump). Repair fuel system as necessary.
  6. Check for defective ignition coil, spark plugs and spark plug cables. See BASIC DIAGNOSTIC PROCEDURES - CARS article. Check EGR system. See EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING - CARS - AVENGER & SEBRING COUPE article. Repair as necessary and recheck system operation.
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