Fuel pump pressure?

FULLEROSA

MEMBER
1997 DODGE RAM
V8
2WD
AUTOMATIC
190,000 MILES

I am working on my ram 1500 pickup truck. I had a code that was for the crank sensor I have replaced the cranksensor. The problem prior to replacing the sensor was what seem to be a lack of fuel. The engine would start and idle well but did not have any power and wanted to stall when excellorated. After stalling it was hard to restart and would only run at idle again no power.

1 Reply

MERLIN2021

MECHANIC
17,250 POSTS

INSUFFICIENT ENGINE POWER Check fuel injectors. Ensure fuel pressure is correct. Check for air inlet restriction. Check for restricted exhaust. Check coolant temperature sensor. Check crank and cam sensors. Check TP sensor and connector. Check ignition and coil circuit. Check MAP sensor.

TESTS W/O CODES - 5.2L -1997 Dodge Pickup R1500
You can try a self-diagnostic test. To activate self diagnostic program:

With the ignition switch in the OFF position, depress the TRIP and RESET buttons.
While holding the TRIP and RESET button turn the ignition switch to the ON position.
Continue to hold the TRIP and RESET buttons until the word CODE appears in the odometer windows (about five seconds ) then release the buttons. If a problem exists, the system will display Diagnostic Trouble Codes (DTC's). If no problem exists, the code 999 (End Test) will momentarily appear.

Fuel Rail Without Fuel Pressure Test Port

1. Disconnect negative battery cable. Release fuel pressure. See FUEL PRESSURE RELEASE under FUEL SYSTEM. Fuel pressure gauge is installed between fuel supply line and fuel line fitting on fuel rail.

2. To disconnect fuel supply line from fuel rail, ensure area around fuel supply line and fuel rail are clean. Note direction of latch clip installation. Latch clip is located on top of fuel supply line at fuel rail. See Fig. 2 . Using 2 screwdrivers, pry latch clip upward, and remove from fuel rail.

3. Pull fuel supply line from fuel rail. Install Adapter (6923) into fuel rail. See Fig. 2 . Ensure adapter is fully seated in fuel rail. Install latch clip into fuel rail, with latch clip fingers pointing downward. If latch clip will not fully seat so latch clip fingers extend downward below fitting on fuel rail, adapter may not be fully seated in fuel rail.

4. Connect fuel supply line to adapter. Ensure fuel supply line fully seats in adapter. Remove protective cap from test port, and install Fuel Pressure Gauge/Hose (5069) at test port. See Fig. 2

5. Start engine and allow to idle. Fuel pressure should be 44-54 psi (303-373 kPa). If no fuel pressure exists and engine will no start, fuel pump relay and control circuit may be defective. See FUEL PUMP RELAY under FUEL SYSTEM.

6. If fuel pressure exceeds specification, fuel pump is okay, but fuel pressure regulator is defective. Replace fuel pressure regulator. Fuel pressure regulator is incorporated with the fuel filter. Fuel filter/fuel pressure regulator is located on top of fuel tank, at fuel pump module. See REMOVE/INSTALL/OVERHAUL - 5.2L article.

7. Release fuel pressure. See FUEL PRESSURE RELEASE under FUEL SYSTEM. Remove latch clip. Remove test equipment. Before reinstalling fuel supply line, ensure fuel supply line fitting and fitting on fuel rail are clean.

8. Lubricate fuel supply line fitting and fitting on fuel rail with engine oil. Install fuel supply line on fuel rail.

9. Install latch clip into fuel rail, with latch clip fingers pointing downward. Ensure latch clip is fully seated. Latch clip fingers should extend downward below fitting on fuel rail when fully seated. See Fig. 2 .

10. Pull on fuel supply line to ensure fuel supply line is fully locked on fuel rail. Reinstall negative battery cable. Start engine and check for fuel leaks. Fig. 2: Identifying Latch Clip & Installing Fuel Pressure Gauge Courtesy of CHRYSLER CORP

BASIC TESTING - 5.2L -1997 Dodge Pickup R1500
Fuel Rail With Fuel Pressure Test Port

1. Disconnect negative battery cable. Release fuel pressure. See FUEL PRESSURE RELEASE under FUEL SYSTEM. Install fuel pressure gauge with hose on fuel pressure test port.

2. Start engine and allow to idle. Fuel pressure should be 44-54 psi (303-373 kPa). If no fuel pressure exists and engine will not start, fuel pump relay and control circuit may be defective. See FUEL PUMP RELAY under FUEL SYSTEM.

3. If fuel pressure exceeds specification, fuel pump is okay, but fuel pressure regulator is defective. Replace fuel pressure regulator. Fuel pressure regulator is incorporated with the fuel filter. Fuel filter/fuel pressure regulator is located on top of fuel tank, at fuel pump module.