NEXON

1.2L REVOTRON ENGINE 11 2. Engine Idle Problems Condition Possible Cause Remedy Engine Starts but does not idle Faulty ETC unit.  Perform Diagnosis test. 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. Incorrect manifold absolute pressure (MAP) sensor signal input.  Check for leakage at sensor.  Perform diagnostic test. MIL & SIL check  Check using diagnostic tool for MIL & SIL. Take corrective action. Defective EMS unit  Check using diagnostic tool. . Take corrective action. Engine idles erratically Disconnected or leaking vacuum line or vacuum leak at inlet manifold.  Inspect all vacuum lines and connections. Repair or replace as necessary. Faulty ETC unit.  Perform diagnostic test. Replace as necessary. Incorrect valve / ignition timing.  Check timing system components and repair or 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. Incorrect MAP sensor signal  Check and replace if necessary. Defective EMS ECU  Check using diagnostic tool. . Take corrective action. Clogged injector  Check for clogged injector. Take corrective action.