Acura Coupes and Sedans 1986-1993 Repair Guide

Relieving Fuel System Pressure


The fuel system is under constant pressure, even when the engine has not been run for a period of time. To avoid injury and/or property damage, always safely relieve the fuel system pressure before servicing any fuel or return line component.

  1. Remove the fuel filler cap.
  3. With the ignition OFF , disconnect the negative battery cable.
  5. Locate the 6mm service bolt; it is located at the fuel inlet line to the fuel filter.
  7. Use a wrench to hold the larger bolt below the service bolt. Use a box-end wrench on the service bolt. Place a rag or cloth over the wrenches and service bolt.
  9. Slowly loosen the service bolt 1 full turn. The pressurized fuel will escape into the rag.
  11. Remove the service bolt, replace the washer and reinstall the bolt. Tighten the bolt to 9 ft. lbs. (12 Nm). The washer must be replaced any time the service bolt is loosened or removed. Failure to replace the washer may result in high-pressure fuel leaks.
  13. Dispose of the fuel-soaked rag in a manner correct for flammable items. Check the surrounding area for any spilled fuel.
  15. The pressure within the system will stay reduced until the ignition switch is turned ON or the fuel pump is operated by other means.