Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

1982 Porsche 928 Automatic TransFACTORY OEM SERVICE PROCEDURE

Ignition Timing

With engine at normal operating temperature, disconnect and plug hoses at distributor advance unit. Stop engine and connect timing light to No. 1 cylinder. Connect tachometer to connection stud above ignition control unit in engine compartment.
CAUTION: Dangerously high voltage exists in ignition system. Ignition must be off when attaching or removing testing equipment, or severe shock may occur.

Start engine and accelerate. Adjust timing as necessary by turning distributor. Return engine to idle, and connect vacuum hoses. Recheck timing. Timing should read TDC to 7° BTDC. If not to specification, distributor should be removed and tested.

Fig 1: Ignition Timing Mark Location

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

IGNITION TIMING (Degrees BTDC@RPM)

Application

Timing

All Models

⁽¹⁾ 23@3000

⁽¹⁾	With distributor vacuum advance hoses disconnected and plugged.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.