Fuel System: Notes

WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Do not modify the system configuration or components, or replace components with parts not specially designed for use with natural gas. Ford Motor Company has specially designed the materials, components and system configuration for the 5.4L Econoline natural gas vehicles, and each particular system is precisely calibrated for efficient operation. The use of different parts or materials can produce an untested configuration that could result in fire or personal injury, or cause engine damage.

WARNING: It is important that your natural gas vehicle be properly maintained by Ford natural gas trained personnel. If a problem occurs, it is important that properly trained personnel diagnose the cause. If the problem relates to the fuel system, proper part replacement is imperative to keep your vehicle operating at normal performance. Natural gas components and gasoline fuel components are not interchangeable. If your vehicle is not serviced in accordance with natural gas-fueled vehicle procedures, damage can occur and your warranty may be invalidated.

NOTE: All standard production components and systems receive routine service under base warranty procedures.

When servicing the fuel system, observe the following information:

All 5.4L CNG engines use a closed-type positive crankcase ventilation (PCV) system and an exhaust emission system to control engine emissions within government specifications.
To maintain the required exhaust emission levels, the fuel system must be kept in proper operating condition.
The Natural Gas fuel system must be adjusted to specifications listed in the appropriate INTRODUCTION - CNG, FLEX-FUEL & GASOLINE article.
Additional engine performance checks are required to keep the exhaust emissions at the specified minimum pollutant level. Refer to the Pre-Delivery Manual for these performance checks and recommended intervals.

This article covers general procedures related directly to the fuel system.