Fuel tank filler tube cap. Fuel tubes/lines/hoses and clamps

Fuel tank filler tube cap

DESCRIPTION

The plastic fuel tank filler tube cap is threaded onto the end of the fuel fill tube. Certain models are equipped with a 1/4 turn cap.

OPERATION

The loss of any fuel or vapor out of fuel filler tube is prevented by the use of a pressure-vacuum fuel fill cap. Relief valves inside the cap will release fuel tank pressure at predetermined pressures. Fuel tank vacuum will also be released at predetermined values.

This cap must be replaced by a similar unit if replacement is necessary. This is in order for the system to remain effective.

Fig. 6 Fuel Injector Rail-4.7L V-8 Engine

1 - MOUNTING BOLTS (4)

2 - INJ.#7

3 - INJ.#5

4 - QUICK-CONNECT FITTING

5 - INJ.#3

6 - FUEL INJECTOR RAIL

7 - INJ.#1

8 - CONNECTOR TUBE

9 - INJ.#2

10 - INJ.#4

11 - INJ.#6

12 - INJ.#8

13 - PRESSURE TEST PORT CAP

CAUTION: Remove fill cap before servicing any fuel system component to relieve tank pressure. If equipped with a California emissions package and a Leak Detection Pump (LDP), the cap must be tightened securely. If cap is left loose, a Diagnostic Trouble Code (DTC) may be set.

Fuel tubes/lines/hoses and clamps

DESCRIPTION

Also refer to Quick-Connect Fittings.

WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF).BEFORE SERVICING ANY FUEL SYSTEM HOSES, FITTINGS OR LINES, THE FUEL SYSTEM PRESSURE MUST BE RELEASED. REFER TO THE FUEL SYSTEM PRESSURE RELEASE PROCEDURE IN THIS GROUP.

The lines/tubes/hoses used on fuel injected vehicles are of a special construction. This is due to the higher fuel pressures and the possibility of contaminated fuel in this system. If it is necessary to replace these lines/tubes/hoses, only those marked EFM/EFI may be used.

If equipped: The hose clamps used to secure rubber hoses on fuel injected vehicles are of a special rolled edge construction. This construction is used to prevent the edge of the clamp from cutting into the hose. Only these rolled edge type clamps may be used in this system. All other types of clamps may cut into the hoses and cause high-pressure fuel leaks.

Use new original equipment type hose clamps