Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM1999DAKOTA SLT, 2D PICKUP, 3.9 X, 4WD, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - BASIC ENGINE TESTING - GASOLINEFUEL SYSTEMFUEL PRESSURE TESTVEHICLES WITHOUT FUEL RAIL TEST PORT
1999 Dodge and Ram Dakota SLT, 2D Pickup, 3.9 X, 4WD, Standard
Vehicles Without Fuel Rail Test Port
1999 Dodge and Ram Dakota SLT, 2D Pickup, 3.9 X, 4WD, StandardSECTION Vehicles Without Fuel Rail Test Port
- Disconnect negative battery cable. Release fuel pressure. See FUEL PRESSURE RELEASE . Fuel pressure gauge is installed between fuel supply line and fuel line fitting on fuel rail.
- 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 1. Using 2 screwdrivers, pry latch clip upward, and remove from fuel rail.
- Pull fuel supply line from fuel rail. Install Adapter (6923) into fuel rail. 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.
- 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.
- Start engine and allow to idle. Fuel pressure should be 44-54 psi (3.1-3.8 kg/cm2 ). If no fuel pressure exists and engine will not start, fuel pump relay and control circuit may be defective. See FUEL PUMP RELAY .
- 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, in fuel pump module. See REMOVAL, OVERHAUL & INSTALLATION - TRUCKS & RWD VANS - GASOLINE article.
- On all models, release fuel pressure. See FUEL PRESSURE RELEASE . Remove latch clip. Remove test equipment. Before reinstalling fuel supply line, ensure fuel supply line fitting and fitting on fuel rail are clean.
- Lubricate fuel supply line fitting and fitting on fuel rail with engine oil. Install fuel supply line on fuel rail.
- 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.
- 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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.