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EMISSION CONTROL 1 FAULT DIAGNOSIS TESTING EVAPORATIVE EMISSION CONTROL The following pressure test procedure is intended to Equipment required. Nitrogen cylinder (compressed air may be used to Water manometer (0 - 30" H2O or more). Pipework and a "T" piece. Method. 1. Ensure that there is at least two gallons of fuel in the petrol tank unless there has never been any 2. Disconnect, at the adsorption canister, the pipe to the vapour separator. 3. Connect this pipe to the nitrogen cylinder and the water manometer using the "T" piece. 4. Pressurize the system to between 26.5 and 27.5 inches of water, allow the reading to stabilize, 5. Measure the pressure drop within a period of 2 minutes 30 seconds. If the drop is greater than 6. Should the system fail the test, maintain the pressure in the system and apply a soap 7. Repeat the test and if successful, dismantle the test equipment and reconnect the pipe to the |