Checking the Timing
- Engine is running at idle.
- Timing light is connected to 12 volts
- Induction pickup is across the spark plug wire to the #1 cylinder
- Point the light at the timing marks and pull the trigger.
- The TDC mark on the pulley should be to the left of the the mark
about 3 degrees.
- If the pulley is 14 cm in diameter (its probably slightly less and
is hard to measure when on the car), it will be 44 cm in
circumference. 3 degrees represents 3.67 mm or just over 1/8 in. With
my Pertronix electronic points, I time mine at 5 deg before TDC which
is a bit over 1/4 in on the circumference of the pulley.
- Don't let your tie get caught in the rotating machinery!
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