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Home >> Chrysler >> 2007 >> Crossfire Base, 2D Convertible >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTCS P1999 To P2561, Checking Fuel Delivery, Symptom Tests, Powertrain Verification Tests >> *Checking Hard Start (Fuel System) >> Diagnostic Test

Diagnostic Test

  1. 1) CHECKING FUEL PRESSURE 
    WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE EVEN WITH THE ENGINE OFF. BEFORE TESTING OR SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE FUEL SYSTEM PRESSURE MUST BE RELEASED.

    Turn the ignition off.

    Install a fuel pressure gauge at the engine.

    Turn the ignition on.

    With the scan tool, actuate the Fuel Pump and observe the fuel pressure gauge.

    NOTE: Fuel pressure specification is 3.7 to 4.2 bar (54 to 61 psi).

    Choose a conclusion that best matches your fuel pressure reading. 

    Below Specification 

    1. Go to step  2).

    Within Specification 

    1. Go to step  4).
  2. 2) RESTRICTED FUEL FILTER/FUEL PRESSURE REGULATOR 
    WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE EVEN WITH THE ENGINE OFF. BEFORE TESTING OR SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE FUEL SYSTEM PRESSURE MUST BE RELEASED.

    Turn the ignition off.

    Remove the Fuel Filter/Fuel Pressure Regulator and inspect for a plugged filter. Refer to REMOVAL .

    Is the Fuel Filter/Fuel Pressure Regulator plugged? 

    Yes 

    1. Replace the Fuel Filter/Fuel Pressure Regulator. Refer to REMOVAL .
    2. Perform POWERTRAIN VERIFICATION TEST - VER 1 .

    No 

    1. Go to step  3).
  3. 3) CHECKING FUEL PUMP INLET STRAINER 
    WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE EVEN WITH THE ENGINE OFF. BEFORE TESTING OR SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE FUEL SYSTEM PRESSURE MUST BE RELEASED.

    With the ignition off.

    Remove and inspect the Fuel Pump Inlet Strainer.

    Is the Fuel Pump Inlet Strainer plugged? 

    Yes 

    1. Replace the Fuel Pump Inlet Strainer. Refer to REMOVAL .
    2. Perform POWERTRAIN VERIFICATION TEST - VER 1 .

    No 

    1. Check the Fuel Supply Line for restrictions. Repair as necessary. If OK, replace the Fuel Pump. Refer to REMOVAL .
    2. Perform POWERTRAIN VERIFICATION TEST - VER 1 .
  4. 4) FUEL INJECTOR(S) 
    WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE EVEN WITH THE ENGINE OFF. BEFORE TESTING OR SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE FUEL SYSTEM PRESSURE MUST BE RELEASED.

    Start the engine and allow the fuel system to reach maximum pressure.

    Turn the ignition off.

    NOTE: Fuel pressure specification is 3.7 to 4.2 bar (54 to 61 psi).

    Apply special tool #C-4390, Hose Clamp Pliers, between the fuel pressure gauge and the fuel pump.

    Monitor the fuel pressure gauge for a minimum of 5 minutes.

    NOTE: The pressure should not fall below 3.0 bar (44 psi).

    Does the fuel pressure drop? 

    Yes 

    1. Replace the leaking fuel injectors. Refer to REMOVAL .
    2. Perform POWERTRAIN VERIFICATION TEST - VER 1 .

    No 

    1. Check the fuel for contaminants.
    2. Perform POWERTRAIN VERIFICATION TEST - VER 1 .
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