State Emissions Testing: Fuel Filler Cap Test Procedure
Fuel Filler Cap: Technical Service Bulletins
State Emissions Test - Fuel Filler Cap Test Procedure
NUMBER: 11-61-00
DATE: 06-01-00
APPLICABILITY:
All Subaru Vehicles
SUBJECT:
State Emission Test / Fuel Filler or Gas Cap Test
Inspection of warranty returned parts has revealed a number of false failures. In the event you encounter a customer complaint of a failed fuel filler cap
(herein gas cap) as a result of a state emission test, please review the following:
The U.S. Environmental Protection Agency issued technical guidance regulations for inspecting the gas cap as part of the state emission inspections in
basic and enhanced Inspection/Maintenance (I/M) programs during August 1998. The gas cap pressure test is administered to all 1980 and older model
gasoline fueled vehicles, which were originally equipped with a sealed gas cap. Also affected are 1981 and newer gasoline fueled vehicles, which are
exempt from the evaporative system integrity (pressure) test. The gas cap pressure test is used to verify whether the gas cap can effectively block the
flow of fuel vapors to the atmosphere. The vehicle inspection consists of both a visual check and functional leak check of the gas cap. The vehicle shall
fail the gas cap visual check if the gas cap is missing or the wrong style gas cap is installed on the vehicle. The gas cap shall fail the functional test if it
leaks a specific amount during a pressure test.
Please perform the following procedure using the Kent-Moore Evaporative Pressure Tester # J-44357 to confirm pass/fail determination as outlined
below.
1.
Threaded Type Gas Cap-(All Legacy, SVX, Impreza and Forester)
^
Plug the lower hose connection of the fuel cap adapter. (J-44357 Evap Kit)
^
Thread the hose of the pressure tester to the upper hose connection.
^
Install the gas cap on the fuel cap adapter.( Tighten to 2-3 clicks)
^
Connect the pump to a 12-volt source.
^
Turn on the pump timer passed the 1-minute setting.
^
Set the pressure hold switch of the pump to the open position.
^
Place the vent switch to the closed position.
^
Allow the pressure to build to its highest level and close the pressure hold switch. The pressure should hold for at least 1 minute.
^
Remove the gas cap from the fuel cap adapter. Replace the gas cap, if the pressure did not hold within 6 inches of H20 as specified on the #
1-44357 Evap Kit gauge. Hold the part for return to SOA, if requested.
2.
Slot Type Gas Cap (All other older Subaru models).
^
Thread the hose of the pressure tester to the fuel cap adapter (# J-44903).
^
Install the gas cap on the fuel cap adapter. (Turn the cap to full lock position.)
^
Connect the pump to a 12-volt source.
^
Turn on the pump timer passed the 1-minute setting.
^
Set the pressure hold switch of the pump to the open position.
^
Place the vent switch to the closed position.
^
Allow the pressure to build to its highest level and close the pressure hold switch. The pressure should hold for at least 1 minute.
^
Remove the gas cap from the fuel cap adapter. Replace the gas cap, if the pressure did not hold within 6 inches of H20 as specified on the #
J-44357 Evap Kit gauge. Hold the part for return to SOA, if requested.
