Ignition

Ignition system operating and timing control on late model cars are accomplished by the engine control computer. Various vehicle and engine operating conditions, including which cylinder is approaching power stroke and exactly where the crankshaft is in it rotation, are monitored by sensors which send their signals to the computer.

Ignition Maintenance Tips

• Change spark plugs every 20,000 miles
• Change wires every 30,000 miles
• Change cap and rotor every 20,000 miles
• Diagnostic scope every 20,000 miles

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Credits:
Illustrations–Russell von Sauers
Tips–Car Quest