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.
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HOMESERVICE MANUALSPORSCHE1982928 AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEIGNITION SYSTEMBOSCH ELECTRONIC IGNITION SYSTEMTESTINGROTOR RESISTANCE CHECK
1982 Porsche 928 Automatic Trans
Rotor Resistance Check
1982 Porsche 928 Automatic TransSECTION Rotor Resistance Check
Set an ohmmeter to the x1000 scale. With ignition switch "OFF" and distributor cap removed, attach ohmmeter leads to rotor. Resistance should be 1000 ohms for Mercedes-Benz or approximately 5000 ohms for other models.
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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.