ENGINE 273 MPFI 243 ENGINE Overheating Likely causes are: Over-advanced ignition timing, Use of fuel with insufficient octanes rating, Weak mixture. Discard spark plugs showing signs of overheating, and cure the cause. Initial Pre-ignition Caused by serious overheating. Causes are those listed for overheating but may be more severe. Corrective measures are urgently needed. Discard plugs in this condition. Ignition SystemDiagnosis Condition Engine cranks, but will not start or hard to start Power fuel economy or engine perfromance Possible Cause Correction No spark • Blown fuse Replace • Loose connection or disconnection of high-tension coil(s) Connect securely • Faulty high-tension coil(s) Replace • Faulty spark plug(s) Adjust,clean or replace • Faulty ignition coil Replace Maladjusted ignition timing • Incorrect ignition timing Adjust • Faulty spark plug(s) Adjust,clean or replace
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