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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