2. Check the fuel pump gasket for leaks, cracks, replace if necessary. 3. Visually inspect fuel tank for leaks and damage. Replace if necessary. Fuel Tank Purging Procedure 4. Remove fuel tank from the vehicle. Refer procedure as mentioned for fuel tank removal. 5. Remove all fuel lines from fuel tank. 6. Remove fuel pump and fuel level gauge from fuel tank. 7. Shift the tank to flushing area. 8. Fill tank with warm water or normal tap water and agitate rigorously and flush out the tank and. 9. Repeat this procedure until inside of the tank is clean. Replace the fuel tank if it is rusty from inside. 10. Completely flush out remaining water after 11. washing. N. CANISTER PURGE VALVE Removal: 1. Disconnect hose from canister purge valve to T connector. 2. Disconnect the hose from canister to purge valve from canister “purge” end. Inspection: 1.With ignition switch OFF, disconnect connectors from canister purge valve. 2. Check resistance between two terminals of canister purge valve. Resistance 26 + 4 ohm at 20C. If resistance is as specified, proceed to next operation, check. If not, replace. 3. Blow air into hose removed from T connector. 4. Verify that no air flows through the valve when the engine is stopped with purge valve connectors disconnected. 5. Air will pass through freely when the 12V battery voltage is applied to valve connector. It indicates that the valve is functioning properly. If no air flows, replace the valve. 6. Reinstall valve connector. 7. Reconnect vacuum hoses. O. CANISTER Removal: 1. Disconnect hose from canister to purge valve. 2. When the air is blown into Tank port, there should be no restriction of flow through Purge port and Air port (i.e. canister bottom port). 3. If the operation differs from the above description, canister must be replaced. 4. Connect hoses to canister. WARNING The purging may not remove all fuel vapours. Therefore any repair on fuel tank using external heat or flame may result in explosion causing personal injury or damage. CAUTION Do not allow water to remain inside fuel tank after washing. This will cause corrosion inside fuel tank. Use shop cotton cloth for tank cleaning. Do not use cotton waste. WARNING Do not suck air through purge valve. Fuel vapours inside valve is harmful. 1.2L REVOTRON CNG PHASE-2 ENGINE 76
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