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Engine Controls and Fuel - 4.6L - Introduction: Component Locations Cadillac STS I facelift

Testing & Diagnostics 24 illustrations ~416 words

Special Tools

CH-48027 Digital Pressure Gage

WARNINGRefer to Gasoline/Gasoline Vapors Warning .
WARNINGRemove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. 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»(ref-338181-S33900845042009081700000) .
  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.
  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.
  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.

CH-48027 Digital Pressure Gage

  1. J 37088-A Fuel Line Disconnect Tool Set
  2. J 44581 Fuel Line Disconnect Tool
  1. J 36850 Transjel Lubricant
  2. J 45004 Fuel Drain Hose

J 45747 Fuel Tank Sender Wrench

J 45747 Fuel Tank Sender Wrench

J 41413 EVAP Pressure and Purge Station

Illustration Tool Number/ Description CH-47976 Active Fuel Injector Tester (AFIT) CH-48027 Digital Pressure Gage CH-48096 EVAP Service Access Port Tool GE-41415-50 Fuel Tank Cap Adapter J-22610 Keystone Clamp Pliers J-26792 HEI Spark Tester J-34730-1A Fuel Pressure Gage J-34730-405 Injector Test Lamp J-35555 Metal Mityvac J-35616 GM-Approved Terminal Test Kit J-36850 Transjel Lubricant J-37088-A Fuel Line Disconnect Tool Set J-37287 Fuel Line Shut-Off Adapters J-38522 Variable Signal Generator J-39021 Fuel Injector Coil and Balance Tester J-39765-A Fuel Sender Lock Ring Tool J-41413-200 Evaporative Emissions System Tester (EEST) J-41413-SPT High Intensity White Light J-42960-2 Fuel Flapper Door Holder J-43094 Spark Plug Boot Puller J-43244 Relay Puller Pliers J-44175 Fuel Composition Tester J-44581 Fuel Line Disconnect Tool J-44602 Injector Test Adapter J-45004 Fuel Tank Drain Hose J-45747 Fuel Tank Sender Wrench

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