Engine Controls - Basic Testing - 2.4L: Diagnosis Chrysler Cirrus I

VISUAL INSPECTION

Visually inspect all electrical wiring, looking for chafed, stretched, cut or pinched wiring. Ensure electrical connectors fit tightly and are not corroded. Ensure vacuum hoses are properly routed and are not pinched or cut. Inspect air induction system for possible vacuum leaks.

FUEL PRESSURE TEST

Note. For additional information on fuel pressure and fuel pump testing procedures, see appropriate NO TROUBLE CODE (NTC) TEST and NO START (NS) TEST in the TESTS W/CODES - 2.4L article.

Scheme 107

1. Disconnect negative battery cable. Release fuel pressure. See «FUEL PRESSURE RELEASE»(ref-24884-S26668209602001010500000) under FUEL SYSTEM.
2. Using fuel pressure gauge hose, connect Fuel Pressure Gauge (C-4799-B) to fuel pressure test port, located at center of fuel rail. Connect scan tool to Data Link Connector (DLC), located below driver's side of instrument panel. (Scheme 107)
3. Turn ignition on. Using scan tool, actuate ASD fuel system test to activate fuel pump and pressurize fuel system. Note fuel pressure. Fuel pressure should be within specification. See FUEL PRESSURE SPECIFICATIONS table. If no fuel pressure exists, fuel pump relay and control circuit may be defective. See «FUEL PUMP RELAY»(ref-24884-S42207350142001010500000) under FUEL SYSTEM.
4. If fuel pressure exceeds specification, check for kinked or restricted fuel return line from fuel filter to fuel pump module. Fuel filter is mounted on the frame, above rear of fuel tank, near fuel pump module on top of fuel tank. If fuel return line is not kinked or restricted, replace fuel pressure regulator. Fuel pressure regulator is mounted inside fuel tank, on fuel pump module. See «REMOVE/INSTALL/OVERHAUL - 2.4L»(ref-24885) article.
5. If fuel pressure is less than specified, release fuel pressure. Install Adapter (6539) and fuel pressure gauge between fuel filter outlet line and chassis fuel supply line. Fuel filter is mounted on the frame, above rear of fuel tank, near fuel pump module on top of fuel tank. Turn ignition on. Using scan tool, actuate ASD fuel system test. Note fuel pressure.
6. If fuel pressure is now within specification, check for kinked or restricted chassis fuel supply line. If fuel pressure is still less than specified, go to next step.
7. Release fuel pressure. Remove fuel pressure gauge and adapter from between fuel filter outlet line and chassis fuel supply line. Reconnect chassis fuel supply line to fuel filter. Install adapter and fuel pressure gauge between fuel pump module and fuel supply line to fuel filter.
8. Turn ignition on. Using scan tool, actuate ASD fuel system test. Note fuel pressure. If fuel pressure is within specification, replace fuel filter along with fuel lines. Fuel lines are permanently attached to fuel filter. If fuel pressure is still less than specified, go to next step.
9. Release fuel pressure. Check for restriction in fuel supply line between fuel pump module and fuel filter. If restriction exists, replace fuel filter along with fuel lines. Fuel lines are permanently attached to fuel filter.
10. If no restriction exists, check for restricted fuel pump inlet strainer. Fuel pump inlet strainer located inside fuel tank, on bottom of fuel pump module. See the «REMOVE/INSTALL/OVERHAUL - 2.4L»(ref-24885) article for fuel pump module removal procedure.
11. If fuel pump inlet strainer is restricted, replace fuel pump inlet strainer. If fuel pump inlet strainer is not restricted, fuel pressure regulator or fuel pump are defective. Fuel pressure regulator and fuel pump are mounted inside fuel tank, on the fuel pump module. See the «REMOVE/INSTALL/OVERHAUL - 2.4L»(ref-24885) article. Release fuel pressure. Remove test equipment.

FUEL PRESSURE SPECIFICATIONS

NO START TESTING PROCEDURES

For additional information on no start testing procedures, see NO START (NS) TESTS in the TESTS W/CODES - 2.4L article.

See also:
• ADJUSTMENTS - 2.4L