Fuel Pressure Release

1990 Dodge and Ram Shadow ES, 2D Hatchback, 2.2 CSECTION Fuel Pressure Release
  1. 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.
  2. 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 .
  3. 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.
Fig 1: 4-Cylinder Injector Harness Connector Identification
G90A13318Courtesy of CHRYSLER MOTORS.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.