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 MANUALSPLYMOUTH1994LASER RS TURBO, AWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 1.8LDIAGNOSTIC CHARTSTEST DR-17A - TESTING FUEL PRESSURE
1994 Plymouth Laser RS Turbo, AWD, Automatic
Test Dr-17A - Testing Fuel Pressure
1994 Plymouth Laser RS Turbo, AWD, AutomaticSECTION Test Dr-17A - Testing Fuel Pressure
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION . For appropriate wiring diagram, see WIRING DIAGRAMS .
- Turn ignition switch to OFF position. Disconnect fuel pump connector at fuel tank. Crank engine for 10 seconds. Turn ignition switch to OFF position. Disconnect negative battery cable.WARNING: High fuel pressure may be present in fuel lines. Open fuel system carefully. See FUEL PRESSURE RELEASE .
- Connect fuel pressure gauge and adapter to fuel rail. Reconnect negative battery cable. Connect jumper wire between positive battery terminal and fuel pump check terminal. See Figure. Check for fuel leaks.
- If no fuel leaks exist, disconnect jumper wire from fuel pump check terminal. Start engine, and let it idle. Disconnect and plug fuel pressure regulator vacuum hose. Fuel pressure should be 47-50 psi (3.3-3.5 kg/cm2 ). If fuel pressure is not within specification, repair as required. Perform TEST VER-2 .
- If fuel pressure is within specification, reconnect vacuum hose to fuel pressure regulator. With vacuum hose connected, fuel pressure should be 37-39 psi (2.6-2.7 kg/cm2 ). If fuel pressure is not within specification, repair as required. Perform TEST VER-2. If fuel pressure is within specification, perform TEST DR-18A.
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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.