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 MANUALSPLYMOUTH1990SUNDANCE RS, 4D HATCHBACK, 2.5 K, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGFUEL PRESSURE RELEASE
1990 Plymouth Sundance RS, 4D Hatchback, 2.5 K, Automatic
Fuel Pressure Release
1990 Plymouth Sundance RS, 4D Hatchback, 2.5 K, AutomaticSECTION Fuel Pressure Release
- Fuel pressure must be fully released before opening fuel system or removing any fuel carrying components. To release pressure in tank, open fuel tank cap slowly.
- To release remaining pressure in system, disconnect injector wiring harness. Using jumper wire, connect injector harness ground terminal No. 1 to ground. Connect injector harness positive terminal No. 2 to positive battery terminal with second jumper wire. See Fig 1 or Fig 2 .
- DO NOT keep injector connector to positive battery terminal for longer than 5 seconds. Remove jumper wires. Fuel injection system can now be opened and fuel carrying components removed as pressure is fully released.
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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.