1.2L REVOTRON ENGINE 12 Engine misfires Disconnected or leaking vacuum line or vacuum leak at inlet manifold Inspect all vacuum lines and inlet manifold. Repair or replace as necessary. Improper grade or contaminated fuel Rush fuel system with fresh, clean, fuel of the correct type. Replace fuel filter. Faulty spark plugs, wires, or ignition coil Check ignition system components for proper operation. Replace as necessary. Incorrect crank angle signal. Check sensor gap and adjust to 1.0 ± 0.4mm Improper firing order Check ignition system and fuel injector connections. Rectify as necessary. Fuel filter if clogged. Replace the fuel filter. fuel lines are pinched or clogged Correct the routine to avoid pinch, or allow shop air to clear the clog in the fuel lines. Improper Electrical supply at pump connector If electrical supply is in proper check electrical system. In adequate fuel pump pressure IF fuel pump does not built pressure then replace. Exhaust system / Catcon damaged Check and take corrective action. 4. Engine Noise Condition Possible Cause Remedy Engine 'pings' or 'knocks' while accelerating or travelling uphill. Improper grade of fuel Fill fuel tank with a minimum BSVI Fuel Spark plugs excessively worn or gapped improperly. Inspect spark plugs. Replace if worn. Incorrect valve/ignition timing Check timing system components and repair or replace as necessary. Excessively worn camshaft Inspect camshaft lobes and run-out for excessive wear. Replace as necessary Fuel filter if clogged. Replace the fuel filter. Fuel lines are pinched or clogged Correct the routine to avoid pinch, or allow shop air to clear the clog in the fuel lines. Improper Electrical supply at pump connector If electrical supply is in proper check electrical system. In adequate fuel pump pressure IF fuel pump does not built pressure then replace.
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