oil FORD E SERIES 2004 4.G Natural Gas Vehicle Supplement Manual

indication that refueling is nearly complete. Also, the station compression
equipment may turn on at any time during the refueling process.
FUEL QUALITY
Do not use liquefied natural gas (LNG) or a CNG that is derived
from a process such as flashing (heating LNG). Failure to use the
correct type of fuel may cause damage to the engine and fuel
system components.
Use only a CNG fuel that meets the specification of NFPA-52 and SAE
J1616 in your NGV. Specifications NFPA-52 and SAE J1616 place limits
on particulate contamination, oil contamination and moisture content to
ensure a quality CNG fuel.
The use of a CNG fuel that does not meet specifications NFPA-52 and
SAE J1616 isnot recommended and may cause engine damage.
Use of poor quality CNG fuel may result in:
• component failure.
• leakage from the fueling point.
• poor vehicle operation.
Use of poor quality fuel may also result in your warranty being
invalidated.
Icing while fueling your vehicle
An icing condition may occur after fueling your vehicle. This may be due
to changes in fuel moisture content, quite often seen during change of
seasons. This condition causes your vehicle ’s fuel fill valve to remain
slightly open, allowing some natural gas to be released.
Breathing hydrocarbon gases (CNG) or air which lacks oxygen
due to the presence of hydrocarbon gases can result in
headache, dizziness and weakness in the arms and legs. In the event of
illness due to inhaling hydrocarbon gases, immediately move the victim
to fresh air and contact medical emergency personnel.
The icing condition may be observed when disconnecting the fuel
dispenser ’s fill nozzle from your vehicle. You may notice more gas than
normal venting from the vehicle fill valve through the vent hose to the
dispenser. If this occurs, keep the fill nozzle connected (or reconnect it)
and wait about 30 seconds. This will allow the ice to melt. Repeat this
procedure as necessary. When normal fuel venting occurs, remove the fill
nozzle and stow it as instructed on the dispenser.
Do not fuel your vehicle with the ignition in the ON position; doing so
may increase the amount of fuel venting during this icing condition.
Servicing your vehicle
11

The purpose of the inspection is to check for exterior damage to the
tank which would shorten its usable life span. This inspection should
only be done by qualified NGV Ford service technicians.
The expiration date for the tank replacement is stated on each tank label
See instructions on fuel container for inspection and service life.
Coalescent fuel filter assembly
Your vehicle is equipped with a coalescent fuel filter assembly. Its
primary function is to remove contaminants; oil and water carryover
moisture from the fuel and trap it in the filter bowl.
The coalescent filter bowl should be drained every 48,000 kilometers
(30,000 miles). Perform fuel system depressurization procedure (outlined
in Service Manual) before disassembling the filter to avoid fuel pressure
regulator damage. The filter element (FG-985) and housing O-ring seal
should also be replaced as specified in the Scheduled Maintenence
Guide.
Spark plugs
Replace spark plugs every 96,000 kilometers (60,000 miles) on E-Series
and F-150 Heritage models and every 60,000 km (36,000 miles) on
Crown Victoria models. Use recommended nickel-plated platinum spark
plugs with the Motorcraft part number AWSF-22FM1 (or equivalent) on
E-Series and F-150 Heritage models and spark plugs with the Motorcraft
part number AWSF-22FM (or equivalent) on Crown Victoria models.
Servicing your vehicle
16