Test NTC-5A: Checking Fuel Delivery
NOTE:
Perform TEST NTC-1A: NO TROUBLE CODES (NTC) TESTS before proceeding.
WARNING:
High fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL SYSTEM PRESSURE RELEASE procedure in SELF-DIAGNOSTICS section in this article.
- Turn ignition off. Release fuel pressure. On 2.7L engine, use Adapter (6539) between fuel rail and chassis supply line, then connect Fuel Pressure Gauge (C-4799-B) to adapter. On 3.2L and 3.5L, connect Fuel Pressure Gauge (C-4799-B) to fuel rail. On all vehicles, turn ignition on. Using scan tool, actuate ASD fuel system test. Observe and record fuel pressure. See FUEL PRESSURE SPECIFICATION table. If fuel pressure is not within specification, go to next step. If fuel pressure is within specification, fuel pressure is okay. Stop ASD fuel system test. Test is complete.
- If fuel pressure is more than specification, replace fuel pump module. Perform TEST VER-2A: ROAD TEST VERIFICATION . If fuel pressure is less than specification, perform TEST NS-4A .
FUEL PRESSURE SPECIFICATION
| Application | Fuel Pressure psi (kg/cm2 ) |
|---|---|
| Concorde, Intrepid, LHS & 300M | 44-54 (3.1-3.8 kg/cm2 ) |