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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Engine Control System & Fuel System - 4.6L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Pressure Relief (With CH 48027) >> Tools Required

Tools Required

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

J 34730-1A  Fuel Pressure Gage. See Special Tools .

CAUTION: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.
CAUTION: Relieve the fuel system pressure before servicing fuel system components in order to reduce the risk of fire and personal injury.
After relieving the system pressure, a small amount of fuel may be released when servicing the fuel lines or connections. In order to reduce the chance of personal injury, cover the regulator and the fuel line fittings with a shop towel before disconnecting. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.
  1. If the fuel system requires repair, prevent fuel spillage by removing the fuel pump fuse. Refer to ELECTRICAL CENTER IDENTIFICATION VIEWS .
    2. Fig 1: View Of Digital Pressure Gauge, Special Tools & Components
    GM1828580
  2. Remove the engine cover, if required.
  3. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
  4. Remove the fuel rail service port cap.
    CAUTION: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel pressure gage. Place the towel in an approved container when the connection of the fuel pressure gage is complete.
  5. Wrap a shop towel around the fuel rail service port.
  6. Connect the CH-48027-3 (4) to the fuel rail service port.
  7. Connect the CH-48027-2 (2) to the CH-48027-3 (4).
  8. Place the hose on the CH-48027-2 (2) into an approved gasoline container.
  9. Open the valve on the CH-48027-2 (2) in order to bleed any fuel from the fuel rail.
  10. Close the valve on the CH-48027-2 (2).
  11. Remove the hose on the CH-48027-2 (2) from the approved gasoline container.
    NOTE: Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system:
    • The fuel pipe connections
    • The hose connections
    • The areas surrounding the connections
    IMPORTANT: If relieving the fuel pressure for the fuel pressure gage installation and removal, it is NOT necessary to proceed with the following steps.
  12. Disconnect the CH-48027-2 (2) from the CH-48027-3 (4).
  13. Disconnect the CH-48027-3 (4) from the fuel rail service port.
  14. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
  15. Install the fuel rail service port cap.
  16. Install the engine cover, if required.
  17. Tighten the fuel fill cap.
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