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.
Test NTC-3A - Checking Fuel Pressure
1994 Plymouth Voyager LE, 3.3 RSECTION Test NTC-3A - Checking Fuel Pressure
WARNING:
High fuel pressure may be present in fuel lines. Open fuel system with caution. See FUEL PRESSURE RELEASE
procedure in this article.
- Release fuel pressure. Connect fuel pressure gauge to fuel rail. Turn ignition on. Using DRB, actuate fuel system. If fuel pressure is 43-53 psi (3.0-3.7 kg/cm2 ), fuel pressure is normal. Test is complete. If fuel pressure is not 43-53 psi (3.0-3.7 kg/cm2 ), record fuel pressure reading. If pressure is more than 53 psi (3.7 kg/cm2 ), go to TEST NTC-3B.
- If pressure is not more than 53 psi (3.7 kg/cm2 ), stop fuel system actuation. Turn ignition off. Inspect fuel lines for kinked or restricted lines. Repair fuel lines as necessary. Perform TEST VER-2 .
- If no kinked or restricted lines exist, release fuel pressure. Remove fuel pressure gauge. Install fuel pressure gauge between fuel tank and fuel filter. Turn ignition on. Using DRB, actuate fuel system. If fuel pressure is at least 5 psi (.4 kg/cm2
) more than previously recorded pressure, replace fuel filter. Perform TEST VER-2.CAUTION: DO NOT allow fuel pressure to exceed 60 psi (4.2 kg/cm2 ) when squeezing fuel return hose.
- If fuel pressure is not at least 5 psi (.4 kg/cm2 ) more than previous reading, gently squeeze fuel return hose while observing fuel pressure gauge, ensuring fuel pressure does not exceed 60 psi (4.2 kg/cm2 ). If fuel pressure increases, replace fuel pressure regulator. Perform TEST VER-2. If fuel pressure does not increase, replace fuel pump and sock assembly. Perform TEST VER-2.
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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.