Evaporative Emissions System - Triumph: Testing

If components (other than filter or canister) have been replaced, or if system is not operating correctly, it can be pressure tested as follows:

1. Make sure there is fuel in fuel tank (minimum of one gallon), run engine for at least one minute to prime system, then turn engine off.
   Fig 1: Evaporative Control System Leak Test Set-Up

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2. Disconnect fuel tank vent line at canister connection. Connect a 0-10 lb. pressure gauge, Schroder valve, and low pressure air supply (use hand tire pump) to this line as indicated in illustration.
3. Use hand pump to pressurize system to one (1) psi.
   CAUTION: This pressure must not be exceeded at any time to avoid damage to fuel tank.

   Hold pressure at this figure and note gauge reading.

4. Pressure reading on gauge should be maintained for 10 seconds without falling more than 0.5 psi. If this reading is not maintained, check visually for leaks from fuel tank and connections, check filler cap for positive sealing.
5. If gauge reading satisfactory after 10 second interval, remove fuel tank filler cap. Pressure should fall to zero.